Installing v2.4 instead of 3.0 with pip --pre

[cbrissaud]

It's not the the right version is install in my computer

pip3 install reservoirpy
DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
Collecting reservoirpy
Downloading reservoirpy-0.2.4.post1.tar.gz (45 kB)
|████████████████████████████████| 45 kB 1.6 MB/s
Preparing metadata (setup.py) ... done
Collecting tqdm>=4.43.0
Downloading tqdm-4.62.3-py2.py3-none-any.whl (76 kB)
|████████████████████████████████| 76 kB 3.2 MB/s
Requirement already satisfied: joblib>=0.12 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (1.1.0)
Collecting dill>=0.3.0numpy>=1.15.0
Downloading dill-0.3.4-py2.py3-none-any.whl (86 kB)
|████████████████████████████████| 86 kB 3.8 MB/s
Requirement already satisfied: scipy>=1.0.0 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (1.8.0.dev0+1753.a063cf3)
Requirement already satisfied: numpy>=1.17.3 in /opt/homebrew/lib/python3.9/site-packages (from scipy>=1.0.0->reservoirpy) (1.21.2)
Building wheels for collected packages: reservoirpy
Building wheel for reservoirpy (setup.py) ... done
Created wheel for reservoirpy: filename=reservoirpy-0.2.4.post1-py3-none-any.whl size=54214 sha256=71ecf37a2e29bab3187bb34473e21f02d445963348ea53f79cdd4122414dfc0e
Stored in directory: /Users/cloebrissaud/Library/Caches/pip/wheels/7b/53/10/7e57451fb406376ebedd8497c5dee6d6f2dbf8d05cf2f23bb7
Successfully built reservoirpy
Installing collected packages: tqdm, dill, reservoirpy
DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
Successfully installed dill-0.3.4 reservoirpy-0.2.4.post1 tqdm-4.62.3
cloebrissaud@MacBook-Air-de-Cloe ~ % pip3 install --pre reservoirpy

DEPRECATION: Configuring installation scheme with distutils config files is deprecated and will no longer work in the near future. If you are using a Homebrew or Linuxbrew Python, please see discussion at Homebrew/homebrew-core#76621
Requirement already satisfied: reservoirpy in /opt/homebrew/lib/python3.9/site-packages (0.2.4.post1)
Requirement already satisfied: dill>=0.3.0numpy>=1.15.0 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (0.3.4)
Requirement already satisfied: tqdm>=4.43.0 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (4.62.3)
Requirement already satisfied: joblib>=0.12 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (1.1.0)
Requirement already satisfied: scipy>=1.0.0 in /opt/homebrew/lib/python3.9/site-packages (from reservoirpy) (1.8.0.dev0+1753.a063cf3)
Requirement already satisfied: numpy>=1.17.3 in /opt/homebrew/lib/python3.9/site-packages (from scipy>=1.0.0->reservoirpy) (1.21.2)

[nTrouvain]

Hello,
This is not how pip works: once you have installed a package, you need to add the --upgrade option to force pip to reinstall a new version. You can also specify the exact version you wish to install:

# this install reservoirpy v0.2.4
pip install reservoirpy

# this update the package to v0.3.0b2
pip install reservoirpy==0.3.0b2

# this should do the same
pip install --upgrade --pre reservoirpy

[neuronalX]

--update does not seem to be a correct argument for pip:

pip install --update --pre reservoirpy

Usage:
  pip install [options] <requirement specifier> [package-index-options] ...
  pip install [options] -r <requirements file> [package-index-options] ...
  pip install [options] [-e] <vcs project url> ...
  pip install [options] [-e] <local project path> ...
  pip install [options] <archive url/path> ...

no such option: --update

[neuronalX]

The command
pip install --pre reservoirpy
install the correct version in my case:

pip install --pre reservoirpy
...
Installing collected packages: reservoirpy
Successfully installed reservoirpy-0.3.0b2

Why is the behaviour different?

PS: in both cases it was under Mac OS

[nTrouvain]

@neuronalX Yes thank you, the option is called --upgrade. I will edit my comment.
@neuronalX if you run the command with --pre the first time, then pip will install the pre-release. The problem comes from the fact that @cbrissaud ran the command twice, without forcing the upgrade in between. pip only reinstalls a package if a different version is explicitely specifyed, if it is not in cache or if the --upgrade option is used.