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Questions tagged [virtualenv]

virtualenv is a tool that creates sandboxed Python environments.

virtualenv allows you to create a sandboxed and isolated environment where Python packages can be installed without interfering with other packages on the same machine. With several virtualenvs, many different pieces of Python software with different and even mutually exclusive dependencies can live together.

The source code of this tool is hosted on GitHub.

Basic usage:

$ virtualenv ENV
$ source ENV/bin/activate
(ENV) $ easy_install (package)
(ENV) $ deactivate
$ ...

See the Command reference for a complete list of all available commands.

A virtualenv can also be set up to completely ignore the system's site-packages, to ensure that all dependencies are installed within the sandboxed environment.

$ virtualenv ENV --no-site-packages
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How to leave/exit/deactivate a Python virtualenv

I'm using virtualenv and the virtualenvwrapper. I can switch between virtualenv's just fine using the workon command. me@mymachine:~$ workon env1 (env1)me@mymachine:~$ workon env2 (env2)me@mymachine:~$ workon env1 (env1)me@mymachine:~$ How do I…
Apreche
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What is the difference between venv, pyvenv, pyenv, virtualenv, virtualenvwrapper, pipenv, etc?

Python 3.3 includes in its standard library the new package venv. What does it do, and how does it differ from all the other packages that seem to match the regex (py)?(v|virtual|pip)?env?
Flimm
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Use different Python version with virtualenv

I have a Debian system currently running with python 2.5.4. I got virtualenv properly installed, everything is working fine. Is there a possibility that I can use a virtualenv with a different version of Python? I compiled Python 2.6.2 and would…
Ulf
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How can I install packages using pip according to the requirements.txt file from a local directory?

Here is the problem: I have a requirements.txt file that looks like: BeautifulSoup==3.2.0 Django==1.3 Fabric==1.2.0 Jinja2==2.5.5 PyYAML==3.09 Pygments==1.4 SQLAlchemy==0.7.1 South==0.7.3 amqplib==0.6.1 anyjson==0.3 ... I have a local archive…
kakarukeys
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Using Python 3 in virtualenv

Using virtualenv, I run my projects with the default version of Python (2.7). On one project, I need to use Python 3.4. I used brew install python3 to install it on my Mac. Now, how do I create a virtualenv that uses the new version? e.g. sudo…
Prometheus
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How do I update\upgrade pip itself from inside my virtual environment?

I'm able to update pip-managed packages, but how do I update pip itself? According to pip --version, I currently have pip 1.1 installed in my virtualenv and I want to update to the latest version. What's the command for that? Do I need to use…
zakdances
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How to install psycopg2 with "pip" on Python?

I'm using virtualenv and I need to install "psycopg2". I have done the following: pip install http://pypi.python.org/packages/source/p/psycopg2/psycopg2-2.4.tar.gz#md5=24f4368e2cfdc1a2b03282ddda814160 And I have the following…
André
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How can I upgrade specific packages using pip and a requirements file?

I'm using pip with a requirements file, in a virtualenv, for my Django projects. I'm trying to upgrade some packages, notably Django itself, and I'm getting an error about source code conflicts: Source in /build/Django has version…
gcaprio
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No module named pkg_resources

I'm deploying a Django app to a dev server and am hitting this error when I run pip install -r requirements.txt: Traceback (most recent call last): File "/var/www/mydir/virtualenvs/dev/bin/pip", line 5, in from pkg_resources import…
igniteflow
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Where does pip install its packages?

I activated a virtualenv which has pip installed. I did pip3 install Django==1.8 and Django successfully downloaded. Now, I want to open up the Django folder. Where is the folder located? Normally it would be in "downloads", but I'm not sure where…
SilentDev
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Comprehensive beginner's virtualenv tutorial?

I've been hearing the buzz about virtualenv lately, and I'm interested. But all I've heard is a smattering of praise, and don't have a clear understanding of what it is or how to use it. I'm looking for (ideally) a follow-along tutorial that can…
Dan Burton
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Is it bad to have my virtualenv directory inside my git repository?

I'm thinking about putting the virtualenv for a Django web app I am making inside my git repository for the app. It seems like an easy way to keep deploy's simple and easy. Is there any reason why I shouldn't do this?
Lyle Pratt
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Determine if Python is running inside virtualenv

Is it possible to determine if the current script is running inside a virtualenv environment?
miracle2k
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How to activate virtualenv?

I have been through search and tried various alternatives without success and spent several days on it now - driving me mad. Running on Red Hat Linux with Python 2.5.2 Began using most recent Virtualenv but could not activate it, I found somewhere…
larry
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Python: No acceptable C compiler found in $PATH when installing python

I'm trying to install new python environment on my shared hosting. I follow the steps written in this post: mkdir ~/src wget http://www.python.org/ftp/python/2.7.1/Python-2.7.1.tgz tar -zxvf Python-2.7.1.tar.gz cd Python-2.7.1 mkdir…
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