How to fix pip hanging on uninstalling sqlalchjemy
<p>In Python 2.7.11 under Windows I have installed sqlalchemy into a virtual environment. Now, when I try to uninstall it via</p>

<pre><code>pip uninstall sqlalchemy
</code></pre>

<p><code>pip</code> hangs when listing the following lines:</p>

<pre><code>.
.
.
c:\venv\lib\site-packages\sqlalchemy\util\langhelpers.py
c:\venv\lib\site-packages\sqlalchemy\util\langhelpers.pyc
c:\venv\lib\site-packages\sqlalchemy\util\queue.py
c:\venv\lib\site-packages\sqlalchemy\util\queue.pyc
c:\venv\lib\site-packages\sqlalchemy\util\topological.py
c:\venv\lib\site-packages\sqlalchemy\util\topological.pyc
</code></pre>

<p>This happens repeatedly, when I cancel the uninstall command and issue it again, even after system restart.</p>

<p>What can I do to make <code>pip</code> continue?</p>