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In Python 2.7.11 under Windows I have installed sqlalchemy into a virtual environment. Now, when I try to uninstall it via
pip uninstall sqlalchemy
pip hangs when listing the following lines:
.
.
.
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
This happens repeatedly, when I cancel the uninstall command and issue it again, even after system restart.
What can I do to make pip continue?
725
One of the most common problems with running Python tools like pip is the “not on PATH” error. This means that Python cannot find the tool you're trying to run in your current directory. In most cases, you'll need to navigate to the directory in which the tool is installed before you can run the command to launch it.
If you want to force pip to clear out its download cache and use the specific version you can do by using --no-cache-dir command. If you are using an older version of pip than upgrade it with pip install -U pip. This will help you clear pip cache.
The pip install <package> command always looks for the latest version of the package and installs it. It also searches for dependencies listed in the package metadata and installs them to ensure that the package has all the requirements that it needs.
Pip is able to install packages configured with their dependencies, because most authors package their code as wheels by default before submitting to PyPI.
If you don't want to type "y" (or you want to run it in a script), use
pip uninstall sqlalchemy --yes
70
Looks like pip uninstall prompts you with "Do you want to continue (Y/N)?", but that is not visible in cygwin or git bash for some reason.
Typing "y" and pressing enter makes the pip uninstall proceed.
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