Making virtualenv using mkvirtualenv or virtualenv, simple command memo.

- create virtual env wrapper & deactivate
mkvirtualenv env-py2 -p python2 #(or python3)
workon env-py2

- create virtual env & deactivate
sudo pip install virtualenv
virtualenv env
sourse env/bin/activate
source deactivate

- delete virtual env
rmvirtualenv envname

- virtualenv dependencies save and install
#On the first, save
pip freeze > requirements.txt
#On the second, install(note! after activating target env)
pip install -r requirements.txt

-show all virtualenv names
lsvirtualenv -l

- PyCharm virtualenv wrapper setting
We have to set directory path manually in preference setting page.
The path is like this in my case.
And then you can select this virtualenv on run/debug configuration.

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