basemap with mac m2 issues

[swiftienimbus]

Hello I am not an expert in programming so I am kindly asking for some help. I just purchased a new laptop (Macbook pro chip M2 pro). I want to install all the programs and packages I used to work with my old macbook air. So I am trying to install basemap (I already tried to install python 3.5 and is already installed in an environment) but i am still getting this error:

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-ain2mraz/matplotlib/

Can I get some help? I have no idea how to solve it, i already installed as well cython but still I don't get any success to install basemap. I want to work with this new laptop to finalize a paper and I really need this package!

Thanks in advance

[molinav]

Hi @swiftienimbus! Can you provide the whole traceback that you get when trying to install basemap? With a bit more info I can try to help you see where the problem is coming from.

Note that we do not have basemap wheels for MacOS on PyPI, so the installation is not simply to download the wheel, but your computer needs to build the wheel from source, which can fail due to several reasons (GEOS missing, GEOS not being found, lack of C/C++ compiler, etc.).

Since you are using a brand new computer, I would also recommend that you try to use a newer Python version (3.8+). Python 3.7 will be EOL this June 2023, Python 3.5 has been EOL for almost 3 years.

[swiftienimbus]

Hi @swiftienimbus! Can you provide the whole traceback that you get when trying to install basemap? With a bit more info I can try to help you see where the problem is coming from.

Note that we do not have basemap wheels for MacOS on PyPI, so the installation is not simply to download the wheel, but your computer needs to build the wheel from source, which can fail due to several reasons (GEOS missing, GEOS not being found, lack of C/C++ compiler, etc.).

Since you are using a brand new computer, I would also recommend that you try to use a newer Python version (3.8+). Python 3.7 will be EOL this June 2023, Python 3.5 has been EOL for almost 3 years.

Thank you for your reply so I installed python 3.5 in an environment because I thought maybe this way basemap would be installed with less issues. I tried to use the following:

pip3 install basemap
I got this in my terminal:
"Defaulting to user installation because normal site-packages is not writeable
Collecting basemap
Using cached basemap-1.3.7.zip (156 kB)
WARNING: Value for prefixed-purelib does not match. Please report this to pypa/pip#10151
distutils: /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/normal/lib/python3.9/site-packages
sysconfig: /Library/Python/3.9/site-packages
WARNING: Value for prefixed-platlib does not match. Please report this to pypa/pip#10151
distutils: /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/normal/lib/python3.9/site-packages
sysconfig: /Library/Python/3.9/site-packages
WARNING: Additional context:
user = False
home = None
root = None
prefix = '/private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/normal'
WARNING: Value for prefixed-purelib does not match. Please report this to pypa/pip#10151
distutils: /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages
sysconfig: /Library/Python/3.9/site-packages
WARNING: Value for prefixed-platlib does not match. Please report this to pypa/pip#10151
distutils: /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages
sysconfig: /Library/Python/3.9/site-packages
WARNING: Additional context:
user = False
home = None
root = None
prefix = '/private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay'
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... done
Collecting matplotlib<3.8,>=1.5
Using cached matplotlib-3.7.1-cp39-cp39-macosx_11_0_arm64.whl (7.3 MB)
Collecting basemap-data<1.4,>=1.3.2
Using cached basemap_data-1.3.2-py2.py3-none-any.whl (30.5 MB)
Collecting pyproj<3.6.0,>=1.9.3
Using cached pyproj-3.5.0-cp39-cp39-macosx_11_0_arm64.whl (5.7 MB)
Collecting numpy<1.25,>=1.22
Using cached numpy-1.24.3-cp39-cp39-macosx_11_0_arm64.whl (13.9 MB)
Collecting pyshp<2.4,>=1.2
Using cached pyshp-2.3.1-py2.py3-none-any.whl (46 kB)
Collecting packaging>=20.0
Using cached packaging-23.1-py3-none-any.whl (48 kB)
Collecting python-dateutil>=2.7
Using cached python_dateutil-2.8.2-py2.py3-none-any.whl (247 kB)
Collecting contourpy>=1.0.1
Using cached contourpy-1.0.7-cp39-cp39-macosx_11_0_arm64.whl (229 kB)
Collecting cycler>=0.10
Using cached cycler-0.11.0-py3-none-any.whl (6.4 kB)
Collecting fonttools>=4.22.0
Using cached fonttools-4.39.4-py3-none-any.whl (1.0 MB)
Collecting pillow>=6.2.0
Using cached Pillow-9.5.0-cp39-cp39-macosx_11_0_arm64.whl (3.1 MB)
Collecting pyparsing>=2.3.1
Using cached pyparsing-3.0.9-py3-none-any.whl (98 kB)
Collecting importlib-resources>=3.2.0
Using cached importlib_resources-5.12.0-py3-none-any.whl (36 kB)
Collecting kiwisolver>=1.0.1
Using cached kiwisolver-1.4.4-cp39-cp39-macosx_11_0_arm64.whl (63 kB)
Collecting zipp>=3.1.0
Using cached zipp-3.15.0-py3-none-any.whl (6.8 kB)
Collecting certifi
Using cached certifi-2023.5.7-py3-none-any.whl (156 kB)
Requirement already satisfied: six>=1.5 in /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/site-packages (from python-dateutil>=2.7->matplotlib<3.8,>=1.5->basemap) (1.15.0)
Building wheels for collected packages: basemap
Building wheel for basemap (PEP 517) ... error

ERROR: Command errored out with exit status 1:
command: /Library/Developer/CommandLineTools/usr/bin/python3 /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py build_wheel /var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/tmpj_f3u4q1
cwd: /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-install-th9cijlq/basemap_635cfaa5d28d4a8b90320b570fa282d8
Complete output (32 lines):
setup.py:58: RuntimeWarning: Cannot find GEOS library and/or headers in standard locations ('/Users/chateau/local', '/Users/chateau', '/usr/local', '/usr', '/opt/local', '/opt', '/sw'). Please install the corresponding packages using your software management system or set the environment variable GEOS_DIR to point to the location where GEOS is installed (for example, if 'geos_c.h' is in '/usr/local/include' and 'libgeos_c' is in '/usr/local/lib', then you need to set GEOS_DIR to '/usr/local'
warnings.warn(" ".join([
running bdist_wheel
running build
running build_py
creating build
creating build/lib.macosx-10.9-universal2-3.9
creating build/lib.macosx-10.9-universal2-3.9/mpl_toolkits
copying src/mpl_toolkits/init.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits
creating build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/cm.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/init.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/test.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/diagnostic.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/proj.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
copying src/mpl_toolkits/basemap/solar.py -> build/lib.macosx-10.9-universal2-3.9/mpl_toolkits/basemap
running build_ext
creating build/temp.macosx-10.9-universal2-3.9
creating build/temp.macosx-10.9-universal2-3.9/src
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -Wno-error=unreachable-code -I/private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages/numpy/core/include -I/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/include/python3.9 -c src/_geoslib.c -o build/temp.macosx-10.9-universal2-3.9/src/_geoslib.o
In file included from src/_geoslib.c:744:
In file included from /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages/numpy/core/include/numpy/arrayobject.h:4:
In file included from /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
In file included from /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages/numpy/core/include/numpy/ndarraytypes.h:1969:
/private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-env-yqy7hxyn/overlay/lib/python3.9/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: "Using deprecated NumPy API, disable it with " "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
#warning "Using deprecated NumPy API, disable it with "
^
src/_geoslib.c:745:10: fatal error: 'geos_c.h' file not found
#include "geos_c.h"
^~~~~~~~~~
1 warning and 1 error generated.
error: command '/usr/bin/clang' failed with exit code 1

ERROR: Failed building wheel for basemap
Failed to build basemap
ERROR: Could not build wheels for basemap which use PEP 517 and cannot be installed directly
WARNING: You are using pip version 21.2.4; however, version 23.1.2 is available.
You should consider upgrading via the '/Library/Developer/CommandLineTools/usr/bin/python3 -m pip install --upgrade pip' command."

Should I install geos? or something else?
I am using M2 pro chip. I was trying to install the python version I wanted for this environment with pyenv but now when I type

python --version
I get this :
pyenv: python: command not found

The `python' command exists in these Python versions:
3.5.10

Note: See 'pyenv help global' for tips on allowing both
python2 and python3 to be found.

Sorry for the inconvenience! your help is appreciated!
Now I tried to set to local the python version but I am not sure whether I have to do this everytime I open the environment?

[molinav]

From your traceback, the issue is coming from the missing GEOS library. In the precompiled wheels, a copy of GEOS is bundled for basemap use. In your case, since there are no wheels for MacOS, you need to build from the source distribution, and GEOS needs to be present somewhere in your system so that pip can try to build the _geoslib extension.

GEOS should be easily installable on MacOS, e.g. through Homebrew. Once you have it, you will need to find out its root installation folder, and define the GEOS_DIR environment variable with this folder path before calling pip to install basemap.

[swiftienimbus]

From your traceback, the issue is coming from the missing GEOS library. In the precompiled wheels, a copy of GEOS is bundled for basemap use. In your case, since there are no wheels for MacOS, you need to build from the source distribution, and GEOS needs to be present somewhere in your system so that pip can try to build the _geoslib extension.

GEOS should be easily installable on MacOS, e.g. through Homebrew. Once you have it, you will need to find out its root installation folder, and define the GEOS_DIR environment variable with this folder path before calling pip to install basemap.

I already followed your instructions and these ones: #539

I installed as well freetype and other packages but I am still gettint this error:

distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('numpy>=1.10.0')
============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
            matplotlib: yes [3.0.3]
                python: yes [3.5.10 (default, May 14 2023, 23:52:54)  [GCC
                        Apple LLVM 14.0.3 (clang-1403.0.22.14.1)]]
              platform: yes [darwin]

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [not found. pip may install it below.]
      install_requires: yes [handled by setuptools]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: yes [version 2.13.0]
                   png: yes [version 1.6.39]
                 qhull: yes [pkg-config information for 'libqhull' could not
                        be found. Using local copy.]

OPTIONAL SUBPACKAGES
           sample_data: yes [installing]
              toolkits: yes [installing]
                 tests: no  [skipping due to configuration]
        toolkits_tests: no  [skipping due to configuration]

OPTIONAL BACKEND EXTENSIONS
                   agg: yes [installing]
                 tkagg: yes [installing; run-time loading from Python Tcl /
                        Tk]
                macosx: yes [installing, darwin]
             windowing: no  [Microsoft Windows only]

OPTIONAL PACKAGE DATA
                  dlls: no  [skipping due to configuration]


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

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-a38hjr4_/matplotlib/
You are using pip version 9.0.1, however version 23.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

Should I change another file? or is it because the python version is not compatible ?
Can I kindly ask for your help since I am not that expert in changing configurations in files :( sorry and thanks for the quick reply!

[molinav]

The problem that you are getting here is different and caused by your Python 3.5 installation. In your last message, you are using Python 3.5 and not Python 3.9 (from your traceback). The support for Python 3.5 in matplotlib was dropped long ago (3.1 if I remember correctly), and at the time there were no wheel builds for the new Apple ARM chips. Because of that is why you are needing to install all the matplotlib build dependencies when trying to install basemap, since matplotlib also needs to be built from source for this old Python version.

I would recommend that you recheck your environment and ensure that you are using Python 3.9 as in your previous message that had the GEOS_DIR error message. Once you are sure that this is correct, I would recommend that you try with the GEOS installation through Homebrew or similar, and then the setup of the GEOS_DIR environment variable to the appropriate folder path.

[swiftienimbus]

Yes thanks, I already did those steps, I checked the version in my current environment and is
Python 3.5.10

Do you suggest changing to the python 3.9 version?
I am still getting this error (I attach the screenshots)

I am tryint to track that file that shows the error to maybe modify it but I can't find it, maybe I'll create a new environment with a higher python version but just want to make sure is because of the python version.

The complete message is here:

I ran:
python -m pip install .

Processing /Users/chateau/basemap/packages/basemap
Ignoring numpy: markers 'python_version == "2.6"' don't match your environment
Ignoring numpy: markers 'python_version == "2.7"' don't match your environment
Ignoring numpy: markers 'python_version == "3.3"' don't match your environment
Ignoring numpy: markers 'python_version == "3.4"' don't match your environment
Ignoring numpy: markers 'python_version == "3.6"' don't match your environment
Ignoring numpy: markers 'python_version == "3.7"' don't match your environment
Ignoring numpy: markers 'python_version >= "3.8"' don't match your environment
Ignoring pyparsing: markers 'python_version == "2.6"' don't match your environment
Ignoring matplotlib: markers 'python_version == "2.6"' don't match your environment
Ignoring matplotlib: markers 'python_version == "2.7"' don't match your environment
Ignoring matplotlib: markers 'python_version == "3.3"' don't match your environment
Ignoring matplotlib: markers 'python_version == "3.4"' don't match your environment
Ignoring pyproj: markers 'python_version == "2.6"' don't match your environment
Ignoring pyproj: markers 'python_version == "2.7"' don't match your environment
Ignoring pyproj: markers 'python_version == "3.3"' don't match your environment
Ignoring pyproj: markers 'python_version == "3.4"' don't match your environment
Ignoring pyshp: markers 'python_version == "2.6"' don't match your environment
Collecting basemap_data<1.4,>=1.3.2 (from basemap==1.3.7+dev)
Using cached https://files.pythonhosted.org/packages/2c/c3/63fdb885308c999206c7a497d79a50891581626da7dc491d432d2732bb46/basemap_data-1.3.2-py2.py3-none-any.whl
Collecting numpy<1.19,>=1.16; python_version == "3.5" (from basemap==1.3.7+dev)
Using cached https://files.pythonhosted.org/packages/01/1b/d3ddcabd5817be02df0e6ee20d64f77ff6d0d97f83b77f65e98c8a651981/numpy-1.18.5.zip
Collecting matplotlib<3.8,>=1.5; python_version >= "3.5" (from basemap==1.3.7+dev)
Using cached https://files.pythonhosted.org/packages/26/04/8b381d5b166508cc258632b225adbafec49bbe69aa9a4fa1f1b461428313/matplotlib-3.0.3.tar.gz
Complete output from command python setup.py egg_info:
Couldn't find index page for 'numpy' (maybe misspelled?)
No local packages or working download links found for numpy>=1.10.0
Traceback (most recent call last):
File "", line 1, in
File "/private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-5r6kd3th/matplotlib/setup.py", line 297, in
cmdclass=cmdclass,
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/distutils/core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/setuptools/dist.py", line 315, in init
self.fetch_build_eggs(attrs['setup_requires'])
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/setuptools/dist.py", line 361, in fetch_build_eggs
replace_conflicting=True,
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/pkg_resources/init.py", line 850, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/pkg_resources/init.py", line 1122, in best_match
return self.obtain(req, installer)
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/pkg_resources/init.py", line 1134, in obtain
return installer(requirement)
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/setuptools/dist.py", line 429, in fetch_build_egg
return cmd.easy_install(req)
File "/Users/chateau/.pyenv/versions/3.5.10/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 659, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('numpy>=1.10.0')
============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
            matplotlib: yes [3.0.3]
                python: yes [3.5.10 (default, May 14 2023, 23:52:54)  [GCC
                        Apple LLVM 14.0.3 (clang-1403.0.22.14.1)]]
              platform: yes [darwin]

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [not found. pip may install it below.]
      install_requires: yes [handled by setuptools]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: yes [version 2.13.0]
                   png: yes [version 1.6.39]
                 qhull: yes [pkg-config information for 'libqhull' could not
                        be found. Using local copy.]

OPTIONAL SUBPACKAGES
           sample_data: yes [installing]
              toolkits: yes [installing]
                 tests: no  [skipping due to configuration]
        toolkits_tests: no  [skipping due to configuration]

OPTIONAL BACKEND EXTENSIONS
                   agg: yes [installing]
                 tkagg: yes [installing; run-time loading from Python Tcl /
                        Tk]
                macosx: yes [installing, darwin]
             windowing: no  [Microsoft Windows only]

OPTIONAL PACKAGE DATA
                  dlls: no  [skipping due to configuration]


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

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/gm/t4q3k1t913b67p1g_j4_gp840000gn/T/pip-build-5r6kd3th/matplotlib/
You are using pip version 9.0.1, however version 23.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

[molinav]

Unless you have a real reason to use Python 3.5, better switch to at least Python 3.9. Otherwise you will have to face these problems not only with basemap but almost with any package, since you will not find MacOS ARM64 wheel packages for any dependency and your system will need to build everything always from source.

Once you have switched to at least Python 3.9, you can try again what you already tried for Python 3.5 and, if the problem persists, feel free to copy the traceback here and I will try to help you.

[swiftienimbus]

Hello thank you so much for your help!

I actually tried to solve that installing a new version of python (i am using pyenv, but i am not very familiar with this, and is giving me problems when I start a new shell window). I tried to install python 3.9 in the nimbus environment and at the end everything was successful until when I want to import basemap via spyder or jupyter notebook, it's giving me this error:

I am not sure if is related to something to the basemap path's that spyder and jupyter notebook can't recognize is already installed, because when I run the program in terminal via:

python scriptfile.py I don't get errors while importing basemap, (but still i am having errors in other parts which would be more easy to see if I could visualize and import everything correctly in spyder)
should I do something else? do you recommend installing python versions with pyenv? or how can i solve this issue related to importing the package in spyder? Thanks again in advance!

[molinav]

Hi @swiftienimbus! For the problem with Spyder and Jupyter notebooks I cannot provide much help because I do not use them regularly. Normally I play around directly using IPython in my console or by running scripts without interaction.

From what you describe, since your scriptfile.py can import basemap without error, I would assume that you installed basemap successfully "somewhere", but it might be that Spyder and Jupyter are installed in a different Python environment where you do not have basemap installed.

Using pyenv is perfectly normal on MacOs and GNU/Linux, I think it is an usual way to have Python installations. Also on Windows I use pyenv-win, which mimics the behaviour of pyenv but on Windows.

[jklymak]

Unless you really know what you are doing, strongly recommend you install Python and Python packages with mamba/conda. You are mixing up versions - basemap has not been an mpl_toolkit for over 10 years. Mamba/conda are not perfect but they take most of the pain out of doing this sort of thing away, particularly for a package like basemap that depends on external C or FORTRAN libraries.

[swiftienimbus]

Hello again @molinav
Yes actually appareantly it was installed within the pyenv folder, but i am not sure why, when I try to install it without opening an environrenmet with pyenv, it does not allow me. I attach a screenshot of what I get after typyin pip install basemap:

Is there a way to call the basemap installation or folders somehow to the python environment I created with conda ? sorry for my (maybe) obvious questions, i am a bit new on this stuff

[swiftienimbus]

hello @jklymak I tried to do that with conda actually, but i got errors since i think those libraries are depracted since years ago, that's why I tried with pyenv but somehow this is giving me more issues :/, I tried to create a new environment with conda with python 3.9 but I got the same message when I try to install basemap, that can't find packages compatible:

and then when i try to do it with pip install, somehow pyenv complains about it :/

[jklymak]

Sorry I guess I should have checked before posting. If I do:

 mamba create -n test basemap

I indeed get:

Encountered problems while solving:
 - package basemap-1.3.6-py311hf94de1b_1 requires basemap-data >=1.3.6,<2.0a0, but none of the providers can be installed

It looks like the recipe is not working on condo-forge.

[molinav]

For basemap, using conda or pyenv is a bit the same situation, because conda-forge does not have a basemap recipe for MacOS ARM64, and PyPI does not have MacOS ARM64 wheels, so in any case you need to build from source.

From your last tracebacks, your system seems to be quite messed up (your mamba/conda installation should also provide python and pip, but later pip is provided to you by the pyenv shims). I would suggest that you clean your system and either use conda or pyenv, but not both together.

[molinav]

@jklymak This is true, conda-forge still does not provide MacOS ARM64 packages (I tried to update the recipe but failed). For the PyPI wheels I simply did not have time to prepare the GitHub Actions.

Still, as long as @swiftienimbus has GEOS and a C compiler, it should be possible to install basemap from the sdist, either with:

python -m pip install basemap

in case that @swiftienimbus is using a system Python or pyenv Python, or with

python -m pip install --no-deps basemap

if using a conda installation, to avoid mixing pip and conda installations as much as possible. Still this would require that @swiftienimbus ensures the presence of the basemap requirements but installing them manually with conda install.