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copied!<p>You can do this without installing <strong>anything</strong> into python itself.</p> <p>You don't need sudo or any privileges.</p> <p>You don't need to edit any files.</p> <p>Install virtualenv into a bootstrap virtual environment. Use the that virtual environment to create more. Since virtualenv ships with pip and distribute, you get everything from one install.</p> <ol> <li>Download virtualenv: <ul> <li><a href="http://pypi.python.org/pypi/virtualenv" rel="noreferrer">http://pypi.python.org/pypi/virtualenv</a></li> <li><a href="https://pypi.python.org/packages/source/v/virtualenv/virtualenv-12.0.7.tar.gz" rel="noreferrer">https://pypi.python.org/packages/source/v/virtualenv/virtualenv-12.0.7.tar.gz</a> (or whatever is the latest version!)</li> </ul></li> <li>Unpack the source tarball</li> <li>Use the unpacked tarball to create a clean virtual environment. This virtual environment will be used to "bootstrap" others. All of your virtual environments will automatically contain pip and distribute.</li> <li>Using pip, install virtualenv into that bootstrap environment.</li> <li>Use that bootstrap environment to create more!</li> </ol> <p>Here is an example in bash:</p> <pre><code># Select current version of virtualenv: VERSION=12.0.7 # Name your first "bootstrap" environment: INITIAL_ENV=bootstrap # Set to whatever python interpreter you want for your first environment: PYTHON=$(which python) URL_BASE=https://pypi.python.org/packages/source/v/virtualenv # --- Real work starts here --- curl -O $URL_BASE/virtualenv-$VERSION.tar.gz tar xzf virtualenv-$VERSION.tar.gz # Create the first "bootstrap" environment. $PYTHON virtualenv-$VERSION/virtualenv.py $INITIAL_ENV # Don't need this anymore. rm -rf virtualenv-$VERSION # Install virtualenv into the environment. $INITIAL_ENV/bin/pip install virtualenv-$VERSION.tar.gz </code></pre> <p>Now you can use your "bootstrap" environment to create more:</p> <pre><code># Create a second environment from the first: $INITIAL_ENV/bin/virtualenv py-env1 # Create more: $INITIAL_ENV/bin/virtualenv py-env2 </code></pre> <p>Go nuts!</p> <h2><strong>Note</strong></h2> <p>This assumes you are not using a really old version of virtualenv. Old versions required the flags <code>--no-site-packges</code> (and depending on the version of Python, <code>--distribute</code>). Now you can create your bootstrap environment with just <code>python virtualenv.py path-to-bootstrap</code> or <code>python3 virtualenv.py path-to-bootstrap</code>.</p>

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