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Make suggestion when the current stable version has no wheel but a pre-release does #4795

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Husky2490 opened this issue Oct 19, 2017 · 21 comments
Open

Make suggestion when the current stable version has no wheel but a pre-release does #4795

Husky2490 opened this issue Oct 19, 2017 · 21 comments
Labels
C: error messages Improving error messages resolution: deferred till PR Further discussion will happen when a PR is made type: feature request Request for a new feature UX User experience related

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@Husky2490
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Husky2490 commented Oct 19, 2017 •
edited by pradyunsg
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  • Pip version: 9.0.1
  • Python version: 3.6.1
  • Operating system: Microsoft Windows [Version 10.0.15063]

Description:

I was trying to install two Python modules, NumPy and SciPy, NumPy installed successfully but SciPy did not. After a while of trying to figure out why it was complaining about missing a bunch of files I decided to check on PyPi to see if there was an alternate download. And, lo and behold, none of the files listed for download were for version 0.19.1, which pip said was the most recent, but instead version 1.0.0rc2, released today (October 18th). After a bit of trial and error, I worked out how to force-feed the file to pip.

What I've run:

I copied the entire cmd prompt session into the attached txt file below
pip-bug_cmd-line-output.txt

Expand for log (edited by @pradyunsg) 

Microsoft Windows [Version 10.0.15063]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\windows\system32>pip install NumPy SciPy

Collecting NumPy

Using cached numpy-1.13.3-cp36-none-win_amd64.whl

Collecting SciPy

Using cached scipy-0.19.1.tar.gz

Installing collected packages: NumPy, SciPy

Running setup.py install for SciPy ... error

Complete output from command "c:\program files\python36\python.exe" -u -c "import setuptools, tokenize;file='C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record C:\Users\s530101\AppData\Local\Temp\pip-qeq_kx7u-record\install-record.txt --single-version-externally-managed --compile:


Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:

  - `pip install .`       (from a git repo or downloaded source
                           release)
  - `pip install scipy`   (last SciPy release on PyPI)


lapack_opt_info:
lapack_mkl_info:
  libraries mkl_rt not found in ['c:\\program files\\python36\\lib', 'C:\\', 'c:\\program files\\python36\\libs']
  NOT AVAILABLE

openblas_lapack_info:
c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:655: UserWarning: Specified path c:\opt\64\lib is invalid.
  return self.get_paths(self.section, key)
  libraries libopenblas_v0.2.20_mingwpy not found in []
  NOT AVAILABLE

atlas_3_10_threads_info:
Setting PTATLAS=ATLAS
  libraries tatlas,tatlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries tatlas,tatlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries tatlas,tatlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
  NOT AVAILABLE

atlas_3_10_info:
  libraries satlas,satlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries satlas,satlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries satlas,satlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_3_10_info'>
  NOT AVAILABLE

atlas_threads_info:
Setting PTATLAS=ATLAS
  libraries ptf77blas,ptcblas,atlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries ptf77blas,ptcblas,atlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries ptf77blas,ptcblas,atlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_threads_info'>
  NOT AVAILABLE

atlas_info:
  libraries f77blas,cblas,atlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries f77blas,cblas,atlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries f77blas,cblas,atlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_info'>
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Atlas (http://math-atlas.sourceforge.net/) libraries not found.
    Directories to search for the libraries can be specified in the
    numpy/distutils/site.cfg file (section [atlas]) or by setting
    the ATLAS environment variable.
  self.calc_info()
lapack_info:
  libraries lapack not found in ['c:\\program files\\python36\\lib', 'C:\\', 'c:\\program files\\python36\\libs']
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Lapack (http://www.netlib.org/lapack/) libraries not found.
    Directories to search for the libraries can be specified in the
    numpy/distutils/site.cfg file (section [lapack]) or by setting
    the LAPACK environment variable.
  self.calc_info()
lapack_src_info:
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Lapack (http://www.netlib.org/lapack/) sources not found.
    Directories to search for the sources can be specified in the
    numpy/distutils/site.cfg file (section [lapack_src]) or by setting
    the LAPACK_SRC environment variable.
  self.calc_info()
  NOT AVAILABLE

Running from scipy source directory.
non-existing path in 'scipy\\integrate': 'quadpack.h'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\setup.py", line 416, in <module>
    setup_package()
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\setup.py", line 412, in setup_package
    setup(**metadata)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\core.py", line 135, in setup
    config = configuration()
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\setup.py", line 336, in configuration
    config.add_subpackage('scipy')
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
    caller_level = 2)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
    caller_level = caller_level + 1)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "scipy\setup.py", line 15, in configuration
    config.add_subpackage('linalg')
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
    caller_level = 2)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
    caller_level = caller_level + 1)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "scipy\linalg\setup.py", line 20, in configuration
    raise NotFoundError('no lapack/blas resources found')
numpy.distutils.system_info.NotFoundError: no lapack/blas resources found

----------------------------------------



Command ""c:\program files\python36\python.exe" -u -c "import setuptools, tokenize;file='C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record C:\Users\s530101\AppData\Local\Temp\pip-qeq_kx7u-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\s530101\AppData\Local\Temp\pip-build-gyp34ubz\SciPy\


C:\windows\system32>pip -h


Usage:

pip  [options]


Commands:

install                     Install packages.

download                    Download packages.

uninstall                   Uninstall packages.

freeze                      Output installed packages in requirements format.

list                        List installed packages.

show                        Show information about installed packages.

check                       Verify installed packages have compatible dependencies.

search                      Search PyPI for packages.

wheel                       Build wheels from your requirements.

hash                        Compute hashes of package archives.

completion                  A helper command used for command completion.

help                        Show help for commands.


General Options:

-h, --help                  Show help.

--isolated                  Run pip in an isolated mode, ignoring

environment variables and user configuration.

-v, --verbose               Give more output. Option is additive, and can be

used up to 3 times.

-V, --version               Show version and exit.

-q, --quiet                 Give less output. Option is additive, and can be

used up to 3 times (corresponding to WARNING,

ERROR, and CRITICAL logging levels).

--log                 Path to a verbose appending log.

--proxy              Specify a proxy in the form

[user:passwd@]proxy.server:port.

--retries          Maximum number of retries each connection should

attempt (default 5 times).

--timeout              Set the socket timeout (default 15 seconds).

--exists-action     Default action when a path already exists:

(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

--trusted-host    Mark this host as trusted, even though it does

not have valid or any HTTPS.

--cert                Path to alternate CA bundle.

--client-cert         Path to SSL client certificate, a single file

containing the private key and the certificate

in PEM format.

--cache-dir 
           Store the cache data in .

--no-cache-dir              Disable the cache.

--disable-pip-version-check

Don't periodically check PyPI to determine

whether a new version of pip is available for

download. Implied with --no-index.


C:\windows\system32>pip install -h


Usage:

pip install [options]  [package-index-options] ...

pip install [options] -r  [package-index-options] ...

pip install [options] [-e]  ...

pip install [options] [-e]  ...

pip install [options] <archive url/path> ...


Description:

Install packages from:


    

  • PyPI (and other indexes) using requirement specifiers.
    • 

  • VCS project urls.
    • 

  • Local project directories.
    • 

  • Local or remote source archives.
    • 



pip also supports installing from "requirements files", which provide

an easy way to specify a whole environment to be installed.


Install Options:

-c, --constraint      Constrain versions using the given constraints

file. This option can be used multiple times.

-e, --editable <path/url>   Install a project in editable mode (i.e.

setuptools "develop mode") from a local project

path or a VCS url.

-r, --requirement     Install from the given requirements file. This

option can be used multiple times.

-b, --build 
           Directory to unpack packages into and build in.

-t, --target           Install packages into . By default this

will not replace existing files/folders in

. Use --upgrade to replace existing

packages in  with new versions.

-d, --download         Download packages into  instead of

installing them, regardless of what's already

installed.

--src                  Directory to check out editable projects into.

The default in a virtualenv is "/src". The default for global installs is

"/src".

-U, --upgrade               Upgrade all specified packages to the newest

available version. The handling of dependencies

depends on the upgrade-strategy used.

--upgrade-strategy <upgrade_strategy>

Determines how dependency upgrading should be

handled. "eager" - dependencies are upgraded

regardless of whether the currently installed

version satisfies the requirements of the

upgraded package(s). "only-if-needed" -  are

upgraded only when they do not satisfy the

requirements of the upgraded package(s).

--force-reinstall           When upgrading, reinstall all packages even if

they are already up-to-date.

-I, --ignore-installed      Ignore the installed packages (reinstalling

instead).

--ignore-requires-python    Ignore the Requires-Python information.

--no-deps                   Don't install package dependencies.

--install-option   Extra arguments to be supplied to the setup.py

install command (use like --install-option="--

install-scripts=/usr/local/bin"). Use multiple

--install-option options to pass multiple

options to setup.py install. If you are using an

option with a directory path, be sure to use

absolute path.

--global-option    Extra global options to be supplied to the

setup.py call before the install command.

--user                      Install to the Python user install directory for

your platform. Typically ~/.local/, or

%APPDATA%\Python on Windows. (See the Python

documentation for site.USER_BASE for full

details.)

--egg                       Install packages as eggs, not 'flat', like pip

normally does. This option is not about

installing from eggs. (WARNING: Because this

option overrides pip's normal install logic,

requirements files may not behave as expected.)

--root                 Install everything relative to this alternate

root directory.

--prefix               Installation prefix where lib, bin and other

top-level folders are placed

--compile                   Compile py files to pyc

--no-compile                Do not compile py files to pyc

--no-use-wheel              Do not Find and prefer wheel archives when

searching indexes and find-links locations.

DEPRECATED in favour of --no-binary.

--no-binary <format_control>

Do not use binary packages. Can be supplied

multiple times, and each time adds to the

existing value. Accepts either :all: to disable

all binary packages, :none: to empty the set, or

one or more package names with commas between

them. Note that some packages are tricky to

compile and may fail to install when this option

is used on them.

--only-binary <format_control>

Do not use source packages. Can be supplied

multiple times, and each time adds to the

existing value. Accepts either :all: to disable

all source packages, :none: to empty the set, or

one or more package names with commas between

them. Packages without binary distributions will

fail to install when this option is used on

them.

--pre                       Include pre-release and development versions. By

default, pip only finds stable versions.

--no-clean                  Don't clean up build directories.

--require-hashes            Require a hash to check each requirement

against, for repeatable installs. This option is

implied when any package in a requirements file

has a --hash option.


Package Index Options (including deprecated options):

-i, --index-url        Base URL of Python Package Index (default

https://pypi.python.org/simple). This should

point to a repository compliant with PEP 503

(the simple repository API) or a local directory

laid out in the same format.

--extra-index-url      Extra URLs of package indexes to use in addition

to --index-url. Should follow the same rules as

--index-url.

--no-index                  Ignore package index (only looking at --find-

links URLs instead).

-f, --find-links       If a url or path to an html file, then parse for

links to archives. If a local path or file://

url that's a directory, then look for archives

in the directory listing.

--process-dependency-links  Enable the processing of dependency links.


General Options:

-h, --help                  Show help.

--isolated                  Run pip in an isolated mode, ignoring

environment variables and user configuration.

-v, --verbose               Give more output. Option is additive, and can be

used up to 3 times.

-V, --version               Show version and exit.

-q, --quiet                 Give less output. Option is additive, and can be

used up to 3 times (corresponding to WARNING,

ERROR, and CRITICAL logging levels).

--log                 Path to a verbose appending log.

--proxy              Specify a proxy in the form

[user:passwd@]proxy.server:port.

--retries          Maximum number of retries each connection should

attempt (default 5 times).

--timeout              Set the socket timeout (default 15 seconds).

--exists-action     Default action when a path already exists:

(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

--trusted-host    Mark this host as trusted, even though it does

not have valid or any HTTPS.

--cert                Path to alternate CA bundle.

--client-cert         Path to SSL client certificate, a single file

containing the private key and the certificate

in PEM format.

--cache-dir 
           Store the cache data in .

--no-cache-dir              Disable the cache.

--disable-pip-version-check

Don't periodically check PyPI to determine

whether a new version of pip is available for

download. Implied with --no-index.


C:\windows\system32>pip install -U

You must give at least one requirement to install (see "pip help install")


C:\windows\system32>pip install -U pip

Requirement already up-to-date: pip in c:\program files\python36\lib\site-packages


C:\windows\system32>pip install -U SciPi

Collecting SciPi

Could not find a version that satisfies the requirement SciPi (from versions: )

No matching distribution found for SciPi


C:\windows\system32>pip install -U SciPy

Collecting SciPy

Using cached scipy-0.19.1.tar.gz

Installing collected packages: SciPy

Running setup.py install for SciPy ... error

Complete output from command "c:\program files\python36\python.exe" -u -c "import setuptools, tokenize;file='C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record C:\Users\s530101\AppData\Local\Temp\pip-bu54g7sh-record\install-record.txt --single-version-externally-managed --compile:


Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:

  - `pip install .`       (from a git repo or downloaded source
                           release)
  - `pip install scipy`   (last SciPy release on PyPI)


lapack_opt_info:
lapack_mkl_info:
  libraries mkl_rt not found in ['c:\\program files\\python36\\lib', 'C:\\', 'c:\\program files\\python36\\libs']
  NOT AVAILABLE

openblas_lapack_info:
c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:655: UserWarning: Specified path c:\opt\64\lib is invalid.
  return self.get_paths(self.section, key)
  libraries libopenblas_v0.2.20_mingwpy not found in []
  NOT AVAILABLE

atlas_3_10_threads_info:
Setting PTATLAS=ATLAS
  libraries tatlas,tatlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries tatlas,tatlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries tatlas,tatlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
  NOT AVAILABLE

atlas_3_10_info:
  libraries satlas,satlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries satlas,satlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries satlas,satlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_3_10_info'>
  NOT AVAILABLE

atlas_threads_info:
Setting PTATLAS=ATLAS
  libraries ptf77blas,ptcblas,atlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries ptf77blas,ptcblas,atlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries ptf77blas,ptcblas,atlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_threads_info'>
  NOT AVAILABLE

atlas_info:
  libraries f77blas,cblas,atlas not found in c:\program files\python36\lib
  libraries lapack_atlas not found in c:\program files\python36\lib
  libraries f77blas,cblas,atlas not found in C:\
  libraries lapack_atlas not found in C:\
  libraries f77blas,cblas,atlas not found in c:\program files\python36\libs
  libraries lapack_atlas not found in c:\program files\python36\libs
<class 'numpy.distutils.system_info.atlas_info'>
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Atlas (http://math-atlas.sourceforge.net/) libraries not found.
    Directories to search for the libraries can be specified in the
    numpy/distutils/site.cfg file (section [atlas]) or by setting
    the ATLAS environment variable.
  self.calc_info()
lapack_info:
  libraries lapack not found in ['c:\\program files\\python36\\lib', 'C:\\', 'c:\\program files\\python36\\libs']
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Lapack (http://www.netlib.org/lapack/) libraries not found.
    Directories to search for the libraries can be specified in the
    numpy/distutils/site.cfg file (section [lapack]) or by setting
    the LAPACK environment variable.
  self.calc_info()
lapack_src_info:
  NOT AVAILABLE

c:\program files\python36\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning:
    Lapack (http://www.netlib.org/lapack/) sources not found.
    Directories to search for the sources can be specified in the
    numpy/distutils/site.cfg file (section [lapack_src]) or by setting
    the LAPACK_SRC environment variable.
  self.calc_info()
  NOT AVAILABLE

Running from scipy source directory.
non-existing path in 'scipy\\integrate': 'quadpack.h'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\setup.py", line 416, in <module>
    setup_package()
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\setup.py", line 412, in setup_package
    setup(**metadata)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\core.py", line 135, in setup
    config = configuration()
  File "C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\setup.py", line 336, in configuration
    config.add_subpackage('scipy')
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
    caller_level = 2)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
    caller_level = caller_level + 1)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "scipy\setup.py", line 15, in configuration
    config.add_subpackage('linalg')
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage
    caller_level = 2)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage
    caller_level = caller_level + 1)
  File "c:\program files\python36\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "scipy\linalg\setup.py", line 20, in configuration
    raise NotFoundError('no lapack/blas resources found')
numpy.distutils.system_info.NotFoundError: no lapack/blas resources found

----------------------------------------



Command ""c:\program files\python36\python.exe" -u -c "import setuptools, tokenize;file='C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record C:\Users\s530101\AppData\Local\Temp\pip-bu54g7sh-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\s530101\AppData\Local\Temp\pip-build-m91wwnr_\SciPy\


C:\windows\system32>pip install SciPy -v

Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect

Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect

Collecting SciPy

1 location(s) to search for versions of SciPy:



C:\windows\system32>pip search SciPy

apgl (0.8.1)                 - A fast python graph library based on numpy and

scipy.

austin (2016.0.1)            - austin scipy package

cloudml (0.4.2)              - Machine learning as a service scipy-trainer

coo_utils (0.1.2.1)          - utilities for managing nested lists of lists of

scipy.sparse matrices

Cybuild (0.1.post4)          - Cybuild =======  High-level compilation of

Cython extension types, based on

scipy.weave.build_tools.

dask-distance (0.2.0)        - Distance computations with Dask (akin to

scipy.spatial.distance)

scipy-data_fitting (1.0.2)   - Complete pipeline for easy data fitting with

Python.

ddeint (0.1.02)              - Scipy-based Delay Differential Equations solver

DESPOTIC (2.1)               - a Python / numPy / sciPy package to perform

calculations related to line emission and

thermal behavior in cold interstellar clouds.

euroscipy2017 (0.2)          - Sample package for demonstrating flit & flonda.

python-fit (1.0.0)           - A python module using scipy's orthogonal

distance regression that makes fitting data

easy.

FITS_tools (0.2)             - Tools for manipulating FITS images using

primarily scipy & native python routines

scikit-fuzzy (0.3.1)         - Fuzzy logic toolkit for SciPy

scikit-geodesic (1.1)        - A SciPy tool for computing geodesics in an

isotropic Riemannian manifold of arbitrary

dimension. It implements the Birkhoff curve

shortening algorithm for finding global

geodesics.

scikit-gof (0.1.3)           - Variations on goodness of fit tests for SciPy.

graf (0.1.2)                 - Light weight numpy, scipy, and matplotlib

wrapper

scikit-gstat (0.1.1)         - Geostatistical expansion in the scipy style

h5sparse (0.0.4)             - Scipy sparse matrix in HDF5.

hcluster (0.2.0)             - A hierarchical clustering package for Scipy.

hydrobox (0.0.4)             - Hydrological toolbox build on top of scipy and

pandas

scikit-image (0.13.1)        - Image processing routines for SciPy

kdense (1.0.0)               - Efficient kernel density estimation for

numpy+scipy.

lsq_linear (0.1.0)           - Implementation of scipy.optimize.lsq_linear for

old scipy version

mathstats (0.2.6)            - Statistical functions, goodness-of-fit tests

and special and special distributions not

implemented in scipy/numpy .

matscipy (0.1.4)             - Generic Python Materials Science tools

mdct (0.4)                   - A fast MDCT implementation using SciPy and FFTs

NeuroSciPy (0.0.0)           -

ParametricModeling (0.1.9)   - An Sklearn interface around

scipy.optimize.least_squares for parametric

modeling

piquant (0.1)                - A Python package extending NumPy and SciPy to

allow specification of numbers and arrays with

physical units.

PXL (0.0.9)                  - Extra functions built on NumPy, SciPy, pandas,

matplotlib, etc.

PyS3DE (1.0.5)               - Python Solver via Sympy + SciPy/NumPy for

Stochastic Differential Equations!

pythreshold (0.1.2)          - Numpy/Scipy implementations of some image

thresholding algorithms

rasterio (1.0a10)            - Fast and direct raster I/O for use with Numpy

and SciPy

scikit-video (0.1.2)         - Video processing routines for SciPy

scikits.bootstrap (0.3.3)    - Bootstrap confidence interval estimation

routines for SciPy

scikits.eartho (0.1dev)      - Earth Observation routines for SciPy

scikits.fitting (0.6)        - Framework for fitting functions to data with

SciPy

scikits.statsmodels (0.3.1)  - Statistical computations and models for use

with SciPy

scipy-stack (0.0.4)          - Helper to install the SciPy stack

scipy-sugar (1.0.4)          - Missing SciPy functionalities

scipy (1.0.0rc2)             - SciPy: Scientific Library for Python

scipydirect (1.3)            - Python wrapper to the DIRECT algorithm

scipyplot (0.0.5)            - A Python Toolbox for Creating Scientific

Article Figures

ScipySim (0.1.5)             - Simulation in Python.

SimpleSpectral (1.0.0)       - Heavily simplified scipy.signal.spectral module

which only depends on NumPy and supports pyFFTW

spicy (0.16.0)               - Because spellchecker. SciPy at your fingertips

statspy (0.1.0a1)            - Python module for statistics built on top of

NumPy/SciPy

stsci.ndimage (0.10.0)       - Various functions for multi-dimensional image

processing--fork of scipy.ndimage for use with

stsci_python

stscipython (2.15.1)         - General astronomical data analysis and Hubble

Space Telescope data calibration

traittypes (0.0.6)           - Scipy trait types


C:\windows\system32>pip -h


Usage:

pip  [options]


Commands:

install                     Install packages.

download                    Download packages.

uninstall                   Uninstall packages.

freeze                      Output installed packages in requirements format.

list                        List installed packages.

show                        Show information about installed packages.

check                       Verify installed packages have compatible dependencies.

search                      Search PyPI for packages.

wheel                       Build wheels from your requirements.

hash                        Compute hashes of package archives.

completion                  A helper command used for command completion.

help                        Show help for commands.


General Options:

-h, --help                  Show help.

--isolated                  Run pip in an isolated mode, ignoring

environment variables and user configuration.

-v, --verbose               Give more output. Option is additive, and can be

used up to 3 times.

-V, --version               Show version and exit.

-q, --quiet                 Give less output. Option is additive, and can be

used up to 3 times (corresponding to WARNING,

ERROR, and CRITICAL logging levels).

--log                 Path to a verbose appending log.

--proxy              Specify a proxy in the form

[user:passwd@]proxy.server:port.

--retries          Maximum number of retries each connection should

attempt (default 5 times).

--timeout              Set the socket timeout (default 15 seconds).

--exists-action     Default action when a path already exists:

(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

--trusted-host    Mark this host as trusted, even though it does

not have valid or any HTTPS.

--cert                Path to alternate CA bundle.

--client-cert         Path to SSL client certificate, a single file

containing the private key and the certificate

in PEM format.

--cache-dir 
           Store the cache data in .

--no-cache-dir              Disable the cache.

--disable-pip-version-check

Don't periodically check PyPI to determine

whether a new version of pip is available for

download. Implied with --no-index.


C:\windows\system32>pip search -h


Usage:

pip search [options] 


Description:

Search for PyPI packages whose name or summary contains .


Search Options:

-i, --index            Base URL of Python Package Index (default

https://pypi.python.org/pypi)


General Options:

-h, --help                  Show help.

--isolated                  Run pip in an isolated mode, ignoring

environment variables and user configuration.

-v, --verbose               Give more output. Option is additive, and can be

used up to 3 times.

-V, --version               Show version and exit.

-q, --quiet                 Give less output. Option is additive, and can be

used up to 3 times (corresponding to WARNING,

ERROR, and CRITICAL logging levels).

--log                 Path to a verbose appending log.

--proxy              Specify a proxy in the form

[user:passwd@]proxy.server:port.

--retries          Maximum number of retries each connection should

attempt (default 5 times).

--timeout              Set the socket timeout (default 15 seconds).

--exists-action     Default action when a path already exists:

(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

--trusted-host    Mark this host as trusted, even though it does

not have valid or any HTTPS.

--cert                Path to alternate CA bundle.

--client-cert         Path to SSL client certificate, a single file

containing the private key and the certificate

in PEM format.

--cache-dir 
           Store the cache data in .

--no-cache-dir              Disable the cache.

--disable-pip-version-check

Don't periodically check PyPI to determine

whether a new version of pip is available for

download. Implied with --no-index.


C:\windows\system32>pip install scipy

Collecting scipy

Using cached scipy-0.19.1.tar.gz

Operation cancelled by user


C:\windows\system32>pip install -h


Usage:

pip install [options]  [package-index-options] ...

pip install [options] -r  [package-index-options] ...

pip install [options] [-e]  ...

pip install [options] [-e]  ...

pip install [options] <archive url/path> ...


Description:

Install packages from:


    

  • PyPI (and other indexes) using requirement specifiers.
    • 

  • VCS project urls.
    • 

  • Local project directories.
    • 

  • Local or remote source archives.
    • 



pip also supports installing from "requirements files", which provide

an easy way to specify a whole environment to be installed.


Install Options:

-c, --constraint      Constrain versions using the given constraints

file. This option can be used multiple times.

-e, --editable <path/url>   Install a project in editable mode (i.e.

setuptools "develop mode") from a local project

path or a VCS url.

-r, --requirement     Install from the given requirements file. This

option can be used multiple times.

-b, --build 
           Directory to unpack packages into and build in.

-t, --target           Install packages into . By default this

will not replace existing files/folders in

. Use --upgrade to replace existing

packages in  with new versions.

-d, --download         Download packages into  instead of

installing them, regardless of what's already

installed.

--src                  Directory to check out editable projects into.

The default in a virtualenv is "/src". The default for global installs is

"/src".

-U, --upgrade               Upgrade all specified packages to the newest

available version. The handling of dependencies

depends on the upgrade-strategy used.

--upgrade-strategy <upgrade_strategy>

Determines how dependency upgrading should be

handled. "eager" - dependencies are upgraded

regardless of whether the currently installed

version satisfies the requirements of the

upgraded package(s). "only-if-needed" -  are

upgraded only when they do not satisfy the

requirements of the upgraded package(s).

--force-reinstall           When upgrading, reinstall all packages even if

they are already up-to-date.

-I, --ignore-installed      Ignore the installed packages (reinstalling

instead).

--ignore-requires-python    Ignore the Requires-Python information.

--no-deps                   Don't install package dependencies.

--install-option   Extra arguments to be supplied to the setup.py

install command (use like --install-option="--

install-scripts=/usr/local/bin"). Use multiple

--install-option options to pass multiple

options to setup.py install. If you are using an

option with a directory path, be sure to use

absolute path.

--global-option    Extra global options to be supplied to the

setup.py call before the install command.

--user                      Install to the Python user install directory for

your platform. Typically ~/.local/, or

%APPDATA%\Python on Windows. (See the Python

documentation for site.USER_BASE for full

details.)

--egg                       Install packages as eggs, not 'flat', like pip

normally does. This option is not about

installing from eggs. (WARNING: Because this

option overrides pip's normal install logic,

requirements files may not behave as expected.)

--root                 Install everything relative to this alternate

root directory.

--prefix               Installation prefix where lib, bin and other

top-level folders are placed

--compile                   Compile py files to pyc

--no-compile                Do not compile py files to pyc

--no-use-wheel              Do not Find and prefer wheel archives when

searching indexes and find-links locations.

DEPRECATED in favour of --no-binary.

--no-binary <format_control>

Do not use binary packages. Can be supplied

multiple times, and each time adds to the

existing value. Accepts either :all: to disable

all binary packages, :none: to empty the set, or

one or more package names with commas between

them. Note that some packages are tricky to

compile and may fail to install when this option

is used on them.

--only-binary <format_control>

Do not use source packages. Can be supplied

multiple times, and each time adds to the

existing value. Accepts either :all: to disable

all source packages, :none: to empty the set, or

one or more package names with commas between

them. Packages without binary distributions will

fail to install when this option is used on

them.

--pre                       Include pre-release and development versions. By

default, pip only finds stable versions.

--no-clean                  Don't clean up build directories.

--require-hashes            Require a hash to check each requirement

against, for repeatable installs. This option is

implied when any package in a requirements file

has a --hash option.


Package Index Options (including deprecated options):

-i, --index-url        Base URL of Python Package Index (default

https://pypi.python.org/simple). This should

point to a repository compliant with PEP 503

(the simple repository API) or a local directory

laid out in the same format.

--extra-index-url      Extra URLs of package indexes to use in addition

to --index-url. Should follow the same rules as

--index-url.

--no-index                  Ignore package index (only looking at --find-

links URLs instead).

-f, --find-links       If a url or path to an html file, then parse for

links to archives. If a local path or file://

url that's a directory, then look for archives

in the directory listing.

--process-dependency-links  Enable the processing of dependency links.


General Options:

-h, --help                  Show help.

--isolated                  Run pip in an isolated mode, ignoring

environment variables and user configuration.

-v, --verbose               Give more output. Option is additive, and can be

used up to 3 times.

-V, --version               Show version and exit.

-q, --quiet                 Give less output. Option is additive, and can be

used up to 3 times (corresponding to WARNING,

ERROR, and CRITICAL logging levels).

--log                 Path to a verbose appending log.

--proxy              Specify a proxy in the form

[user:passwd@]proxy.server:port.

--retries          Maximum number of retries each connection should

attempt (default 5 times).

--timeout              Set the socket timeout (default 15 seconds).

--exists-action     Default action when a path already exists:

(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

--trusted-host    Mark this host as trusted, even though it does

not have valid or any HTTPS.

--cert                Path to alternate CA bundle.

--client-cert         Path to SSL client certificate, a single file

containing the private key and the certificate

in PEM format.

--cache-dir 
           Store the cache data in .

--no-cache-dir              Disable the cache.

--disable-pip-version-check

Don't periodically check PyPI to determine

whether a new version of pip is available for

download. Implied with --no-index.


C:\windows\system32>pip -V

pip 9.0.1 from c:\program files\python36\lib\site-packages (python 3.6)


C:\windows\system32>pip install scipy-1.0.0rc2-cp36-none-win_amd64.whl

Requirement 'scipy-1.0.0rc2-cp36-none-win_amd64.whl' looks like a filename, but the file does not exist

Processing c:\windows\system32\scipy-1.0.0rc2-cp36-none-win_amd64.whl

Exception:

Traceback (most recent call last):

File "c:\program files\python36\lib\site-packages\pip\basecommand.py", line 215, in main

status = self.run(options, args)

File "c:\program files\python36\lib\site-packages\pip\commands\install.py", line 324, in run

requirement_set.prepare_files(finder)

File "c:\program files\python36\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files

ignore_dependencies=self.ignore_dependencies))

File "c:\program files\python36\lib\site-packages\pip\req\req_set.py", line 620, in prepare_file

session=self.session, hashes=hashes)

File "c:\program files\python36\lib\site-packages\pip\download.py", line 809, in unpack_url

unpack_file_url(link, location, download_dir, hashes=hashes)

File "c:\program files\python36\lib\site-packages\pip\download.py", line 715, in unpack_file_url

unpack_file(from_path, location, content_type, link)

File "c:\program files\python36\lib\site-packages\pip\utils_init.py", line 599, in unpack_file

flatten=not filename.endswith('.whl')

File "c:\program files\python36\lib\site-packages\pip\utils_init_.py", line 482, in unzip_file

zipfp = open(filename, 'rb')

FileNotFoundError: [Errno 2] No such file or directory: 'C:\windows\system32\scipy-1.0.0rc2-cp36-none-win_amd64.whl'


C:\windows\system32>pip install scipy scipy-1.0.0rc2-cp36-none-win_amd64.whl

Requirement 'scipy-1.0.0rc2-cp36-none-win_amd64.whl' looks like a filename, but the file does not exist

Double requirement given: scipy==1.0.0rc2 from file:///C:/windows/system32/scipy-1.0.0rc2-cp36-none-win_amd64.whl (already in scipy, name='scipy')


C:\windows\system32>pip install scipy https://pypi.python.org/packages/ed/23/cc831da308cf4f7e319c73e32197a1204daed6ce8c76c741fcaf1903c489/scipy-1.0.0rc2-cp36-none-win_amd64.whl#md5=9184ee5f1dd5745e42901b0a9de40373

Double requirement given: scipy==1.0.0rc2 from https://pypi.python.org/packages/ed/23/cc831da308cf4f7e319c73e32197a1204daed6ce8c76c741fcaf1903c489/scipy-1.0.0rc2-cp36-none-win_amd64.whl#md5=9184ee5f1dd5745e42901b0a9de40373 (already in scipy, name='scipy')


C:\windows\system32>pip install https://pypi.python.org/packages/ed/23/cc831da308cf4f7e319c73e32197a1204daed6ce8c76c741fcaf1903c489/scipy-1.0.0rc2-cp36-none-win_amd64.whl#md5=9184ee5f1dd5745e42901b0a9de40373

Collecting scipy==1.0.0rc2 from https://pypi.python.org/packages/ed/23/cc831da308cf4f7e319c73e32197a1204daed6ce8c76c741fcaf1903c489/scipy-1.0.0rc2-cp36-none-win_amd64.whl#md5=9184ee5f1dd5745e42901b0a9de40373

Downloading scipy-1.0.0rc2-cp36-none-win_amd64.whl (30.8MB)

100% |████████████████████████████████| 30.8MB 41kB/s

Requirement already satisfied: numpy>=1.8.2 in c:\program files\python36\lib\site-packages (from scipy==1.0.0rc2)

Installing collected packages: scipy

Successfully installed scipy-1.0.0rc2

@benoit-pierre
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This is normal, 1.0.0rc2 is a pre-release version, by default pip only finds stable versions. Use the install --pre option to change the behavior:

 --pre    Include pre-release and development versions. By default, pip only finds stable versions.

@pradyunsg pradyunsg added resolution: invalid Invalid issue/PR type: support User Support labels Oct 19, 2017
@pradyunsg
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Adding to what @benoit-pierre said, you'd probably want to do:

pip install -U --pre scipy

@ghost
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ghost commented Oct 19, 2017

I understand that this is a small use case (a few months ago SciPy couldn't even be compiled on windows), but IMHO it's worth considering an improved user experience here. I suggest a simple warning message when there is a pre-release wheel available but only a source distribution for the stable version:

Note: the current stable version has no wheel but a pre-release does. Use --pre to install.

@astrojuanlu
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My answer would be: "please try again" :) Now SciPy has wheels for Windows.

@Husky2490
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Husky2490 commented Nov 10, 2017 •
edited
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I suggest a simple warning message when there is a pre-release wheel available but only a source distribution for the stable version:

Note: the current stable version has no wheel but a pre-release does. Use --pre to install.

Has this been marked as a feature request yet?

Edit: I think that it might be best to put that as its own issue for searchability and clarity

@pfmoore pfmoore added the type: feature request Request for a new feature label Nov 10, 2017
@ghost
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ghost commented Nov 10, 2017

?

@Husky2490
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Maybe I'm just being dumb (please tell me if I am)

@Husky2490
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Husky2490 commented Nov 10, 2017 •
edited
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I am very indecisive about things like this. Always have, most likely always will be. I think it's some kind of social anxiety as I feel like I will be wasting other people's time no matter what I choose to do sometimes.
Edit: spelling

@pfmoore
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pfmoore commented Nov 10, 2017

I marked this issue as a feature request, as you asked. You closed it (about the same time). I'm confused too. As a closed feature request, no-one is likely to do anything about it. If you'd left it open, then it's waiting for someone to submit a PR (maybe you, maybe someone else).

I certainly don't mind it being marked as a feature request. That doesn't waste anyone's time - it just flags it as a possible enhancement that would be useful to someone, and might be something that someone would like to pick up and implement. You've highlighted an area where pip could be improved, that's a useful contribution even if nothing further ever happens, and it's appreciated.

@Husky2490
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alright

@Husky2490 Husky2490 reopened this Nov 10, 2017
@pradyunsg pradyunsg removed the resolution: invalid Invalid issue/PR label Nov 10, 2017
@chrahunt chrahunt added state: awaiting PR Feature discussed, PR is needed and removed type: support User Support labels Sep 15, 2019
@pradyunsg pradyunsg added this to the Print Better Error Messages milestone Mar 6, 2020
@deveshks
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I created a minimal package testpkg with version 1.0.0.dev0, and then created an sdist for it, and then tried the following commands

I first tried to install it without providing the --pre flag, and pip couldn't find it, even though I have a source distribution with the development version.

pip install --no-cache  --find-links=/Users/devesh/Desktop/testpkg/dist/ testpkg==1.0.*
Looking in links: /Users/devesh/Desktop/testpkg/dist/
ERROR: Could not find a version that satisfies the requirement testpkg==1.0.* (from versions: 1.0.0.dev0)
ERROR: No matching distribution found for testpkg==1.0.*

Now when I provided the --pre flag, pip was able to find and install it

(.env) DeveshSinghMac:testpkg devesh$ pip install --pre --no-cache  --find-links=/Users/devesh/Desktop/testpkg/dist/ testpkg==1.0.* 
Looking in links: /Users/devesh/Desktop/testpkg/dist/
Processing ./dist/testpkg-1.0.0.dev0.tar.gz
  WARNING: Requested testpkg==1.0.* from file:///Users/devesh/Desktop/testpkg/dist/testpkg-1.0.0.dev0.tar.gz, but installing version 1.0.0.dev0
Building wheels for collected packages: testpkg
  Building wheel for testpkg (setup.py) ... done
  Created wheel for testpkg: filename=testpkg-1.0.0.dev0-py3-none-any.whl size=1404 sha256=3d5204bc87fc286062115c7621a2ff8f9bb9a689210def6ca67622f46f1db1be
  Stored in directory: /private/var/folders/xg/blp845_s0xn093dyrtgy936h0000gp/T/pip-ephem-wheel-cache-i_10krxc/wheels/00/71/2e/7fad5819728fd08c9f0d89a85bf5f794c25ee7042ca3e4524e
Successfully built testpkg
Installing collected packages: testpkg
Successfully installed testpkg-1.0.0.dev0

So now, if I understand correctly, for this feature, we should be printing the warning Note: the current stable version has no wheel but a pre-release does. Use --pre to install in the first case?

@uranusjr
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Also related is #7579, which proposes to change the behaviour and just let pip find rc versions when no stable matches are available.

@deveshks
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Also related is #7579 , which proposes to change the behaviour and just let pip find rc versions when no stable matches are available.

Thanks for the reference. That change seems to require a PEP update as per #7579 (comment) , which IMO is a much larger change, w.r.t this issue which is to try and find a pre-release version match according to the specifier, and suggesting the user that such a version is available and can be installed.

Considering these facts, should I go ahead and attempt this change in a PR, or we should way for resolution of #7579 , at which point this will automatically be resolved?

@uranusjr
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I don’t think anyone is actively pushing a PEP change on this. Better go on and attempt the error message if you want to get this resolved.

@deveshks
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I don’t think anyone is actively pushing a PEP change on this. Better go on and attempt the error message if you want to get this resolved.

Sure will do. But I am still wondering if this is a beneficial change, and the warning/suggestion about trying to install a pre-release actually help the user?

@uranusjr
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IMO the message would be quite useful, at least from my own experience.

@deveshks
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IMO the message would be quite useful, at least from my own experience.

Okay, I will create a PR for the same then. Also, IIUC,

pip/src/pip/_internal/index/package_finder.py

Lines 461 to 473 in 6a7bf94

versions = {
str(v) for v in specifier.filter(
# We turn the version object into a str here because otherwise
# when we're debundled but setuptools isn't, Python will see
# packaging.version.Version and
# pkg_resources._vendor.packaging.version.Version as different
# types. This way we'll use a str as a common data interchange
# format. If we stop using the pkg_resources provided specifier
# and start using our own, we can drop the cast to str().
(str(c.version) for c in candidates),
prereleases=allow_prereleases,
)
}

is where we decide whether to include or exclude prereleases. So either we can

  1. Always include pre-releases and then filter them out if -pre flag was not set, and then if no applicable_candidates were found, raise a warning. This is a more eager approach.

  2. If -pre flag was not set, and then if no applicable_candidates were found, rerun the specifier.filter and see if any pre-releases can be found, and if they are, raise a warning. This is a more lazy approach.

I would be happy to hear your thoughts on both of these, or if there are better ways of doing this then these two.

@pradyunsg pradyunsg changed the title Pip attempted to install an outdated version of SciPy Make suggestion when the current stable version has no wheel but a pre-release does Apr 26, 2020
@pradyunsg pradyunsg added resolution: deferred till PR Further discussion will happen when a PR is made and removed state: awaiting PR Feature discussed, PR is needed labels Apr 26, 2020
@NoahGorny
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@deveshks I like the first approach better

@deveshks
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@deveshks I like the first approach better

On thinking further, I actually think that the situation where a pre-release has a wheel, but a stable version does might be infrequent (For e.g. in pip, we only had pre-releases for about 2 weeks, before we will have a full release). So the second approach of considering pre-releases in the search lazily might be better, rather than eagerly searching for all pre-releases always, but since most of the times there would be a stable release found.

But I will wait for others to chime in before deciding on the approach

@pfmoore
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pfmoore commented Apr 27, 2020

I'm now confused as to what's being proposed here. To state my views:

  1. Any change to what pip installs (or a change to install where it currently says nothing is available) would need a PEP 440 change, as per Follow PEP 440 and install non-dev versions if --pre is not given #7579 (comment) which notes that pip is currently PEP-compliant here.
  2. Providing a warning when pip fails to install anything but there's pre-releases available seems reasonable, but it doesn't address the OP's situation, where if I understand it, there was a normal release but only in source form. In that case --only-binary or --prefer-binary might have helped, but I suspect that anyone knowing they needed to use that would have also been able to diagnose "I got sources rather than a wheel" from the messages given.
  3. Producing a warning when we choose a source release and binaries are available for other releases (pre-release or not) is IMO too intrusive.
  4. Producing better output, showing just enough information to make it clear that we did a source install, while not overwhelming the user with build information (but still showing build errors) is a hard problem. I don't think we have it right, but I'm not sure how to improve things. Ideas are welcome here.

So adding a warning is probably OK in theory, but I don't think there's any particular evidence that it would be useful in practice.

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  1. Any change to what pip installs (or a change to install where it currently says nothing is available) would need a PEP 440 change, as per Follow PEP 440 and install non-dev versions if --pre is not given #7579 (comment) which notes that pip is currently PEP-compliant here.

Agreed. The final outcome of a PR generated from this will be to just to suggest the user about potential installation options, and not to change the default behaviour in any way.

  1. Providing a warning when pip fails to install anything but there's pre-releases available seems reasonable, but it doesn't address the OP's situation, where if I understand it, there was a normal release but only in source form. In that case --only-binary or --prefer-binary might have helped, but I suspect that anyone knowing they needed to use that would have also been able to diagnose "I got sources rather than a wheel" from the messages given.

I think I misread the intentions of the OP and assumed that we needed to provide a warning when pip fails to install anything but there's pre-releases available, and your outline above is the actual problem faced. But I agree that the user can figure this out on it's own as well, and the warning won't serve a real purpose. Thanks for the clarification.

  1. Producing a warning when we choose a source release and binaries are available for other releases (pre-release or not) is IMO too intrusive.

Agreed, and I think we won't go that route.

  1. Producing better output, showing just enough information to make it clear that we did a source install, while not overwhelming the user with build information (but still showing build errors) is a hard problem. I don't think we have it right, but I'm not sure how to improve things. Ideas are welcome here.

I think this is a better problem to handle, but it might be out of scope of this issue, and would warrant a new issue IMO

So adding a warning is probably OK in theory, but I don't think there's any particular evidence that it would be useful in practice.

Yes, from the different points you raised, I guess the warning might be too intrusive, or not very helpful. So if we want to address point 4, a new issue can be created. Otherwise we can go ahead and close this issue.

Also please feel free to correct me in the understanding of any of the points I mentioned above 😊

@nlhkabu nlhkabu added C: error messages Improving error messages UX User experience related labels Jul 28, 2020
@nlhkabu nlhkabu removed this from the Print Better Error Messages milestone Jul 29, 2020
@ankostis ankostis mentioned this issue Oct 16, 2020
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C: error messages Improving error messages resolution: deferred till PR Further discussion will happen when a PR is made type: feature request Request for a new feature UX User experience related
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