Installing v2.4 instead of 3.0 with pip --pre about reservoirpy HOT 4 CLOSED

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

from reservoirpy.

--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

from reservoirpy.

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

from reservoirpy.

@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.

from reservoirpy.