问题
Recently, (I have no idea when), I installed this package called pymol. Today when I was trying to copy a list of all my install modules, I encountered this error.
~/Projects$ python -c "help('modules')"
Please wait a moment while I gather a list of all available modules...
Error: unable to initalize the pymol.cmd module
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pymol/cmd.py", line 117, in <module>
from chempy import io
ImportError: cannot import name io
I've tried
sudo pip uninstall pymol
This definitely worked... but it also definitely did not work. It removed the .egg, and pip list tells me it's not installed, but the tool is still there. I open a python prompt and import it with no problem. Now my question is, if I just delete the package, is there anything that could go wrong, (WCS I'm thinking kafkaesque broken dependency fixing for the rest of my natural life.) and is there a standardized, best practice to remove this, or any other package manually.
来源：https://stackoverflow.com/questions/25213533/python-helpmodules-returns-importerror