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{{tag>Brouillon Code Python}}

= Python virtualenv pyvenv pyenv pipenv poetry

Voir :
* https://linuxfr.org/news/python-partie-7-environnements-virtuels
* https://docs.python.org/fr/3/tutorial/venv.html
* https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/
* http://sametmax.com/les-environnement-virtuels-python-virtualenv-et-virtualenvwrapper/
* https://makina-corpus.com/blog/metier/2015/bien-configurer-son-environnement-de-developpement-python
* https://medium.com/python-pandemonium/better-python-dependency-and-package-management-b5d8ea29dff1
* https://jacobian.org/2010/jul/20/when-pypi-goes-down/
* poetry



== pyvenv

**Remplacé par ''python3 -m venv''**

<code bash>
pyvenv plop
cd plop
source bin/activate
pip install --upgrade pip
#deactivate
</code>


<code bash>
pyvenv
cd env/
cd ..
source env/bin/activate
pip install -r requirements.txt 
</code>

<code bash>
python3 -m venv plop
source plop/bin/activate
</code>

== pipenv

Source : http://sametmax.com/pipenv-solution-moderne-pour-remplacer-pip-et-virtualenv/

Préciser la version de Python à utiliser
| python2 | ''--two''   |
| python3 | ''--three'' |

Install via PIP
<code bash>
python3 -m pip install pip --upgrade --user
python3 -m pip install pipenv --user
</code>

Install via apt
<code bash>
apt-get install pipenv
</code>

Exemple
<code bash>
pipenv run python
pipenv shell
pipenv install --dev
</code>

<code bash>
# Créer le fichier des dépendances
pipenv lock

# Installer toutes les dépendances
pipenv install
</code>

Afficher les dépendances
<code bash>
pipenv graph
</code>

Chemin du dossier du virtualenv
<code bash>
pipenv --venv
</code>


=== Pb

==== AttributeError: module 'pip' has no attribute 'get_installed_distributions' 

<code ->
$ pipenv check                                                                                                            
Checking PEP 508 requirements…
Passed!
Checking installed package safety…
An error occurred:
Traceback (most recent call last):
  File "/usr/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/__main__.py", line 8, in <module>                                                                     
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/click/core.py", line 722, in __call__                                                                 
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/click/core.py", line 697, in main                                                                     
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/click/core.py", line 1066, in invoke                                                                  
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/click/core.py", line 895, in invoke                                                                   
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/click/core.py", line 535, in invoke                                                                   
  File "/usr/lib/python3/dist-packages/pipenv/patched/safety.zip/safety/cli.py", line 52, in check                                                                     
AttributeError: module 'pip' has no attribute 'get_installed_distributions'
</code>

===== Solution

<code bash>
sudo apt-get -y autoremove --purge pipenv python3-virtualenv-clone
</code>

<code ->
$ python3 -m pip install pip --upgrade --user
$ python3 -m pip install pipenv --user
</code>