Sorry if I sound a bit foolish. I'm confused about this what's the difference between the two
virtualenv myvenv
and
-m venv myvenv
The first one works well for me in creating virtual environments while the other does not.
I CD into my development directory and use " virtualenv myvenv " and it creates the virtual environment. But if I use " -m venv myvenv " it just gives errors. Please help me understand
venv is a package shipped directly with python 3. So you don't need to pip install
anything.
virtualenv instead is an independent library available at https://virtualenv.pypa.io/en/stable/ and can be install with pip
.
They solve the same problem and work in a very similar manner.
If you use python3 I suggest to avoid an "extra" dependancy and just stick with venv
Your error is probably because you use Python2/pip2
I think the virtualenv docs explain this the best:
venv
is a subset of virtualenv
integrated into the standard library since Python 3.3. The subset meaning that only part of virtualenv
s functionality is in venv
:
venv
can be slower since it does not have " app-data
seed method" venv
is only upgraded via upgrading the Python version, while virtualenv
is updated using pip. venv
is not extendable virtualenv
have more rich programmatic API (describe virtual environments without creating them). See the venv
API here .venv
cannot automatically discover arbitrarily installed python versions, while virtualenv
does. This means, that with venv
you have to specify the full path of the python
executable, if you want to use some other python version than the first one in the PATH. With virtualenv
, you can just give the version number. See python discovery in the virtualenv documentation. To me the differences are quite subtle and the only practical difference has been that venv
is included in the standard library (since 3.3). I have been using python -m venv venv
for a long time and have never needed an alternative.
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