Unable to uninstall package named `-umpy`

问题

Runnig py -m pip list in windows powershell, produces:

Package         Version
--------------- -------
-umpy           1.15.4
autogui         0.1.8
beautifulsoup4  4.8.0
cycler          0.10.0
et-xmlfile      1.0.1
...and so on

as you can see there is a package named -umpy which must be some kind of a computer hiccup.

Now I want to uninstall this package but the py -m pip uninstall -umpy command does not work since it thinks I am trying to pass an argument..

Does anybody know how to get rid of this package?

I have already tried various escapes:

>> py -m pip uninstall /-umpy
ERROR: Invalid requirement: '/-umpy'

>> py -m pip uninstall `-umpy
Usage:
  C:\Program Files\Python35\python.exe -m pip uninstall [options] <package> ...
  C:\Program Files\Python35\python.exe -m pip uninstall [options] -r <requirements file> ...

no such option: -u

>> py -m pip uninstall \-umpy
ERROR: Invalid requirement: '\\-umpy'
Hint: It looks like a path. File '\-umpy' does not exist.

>> py -m pip uninstall "-umpy"
Usage:
  C:\Program Files\Python35\python.exe -m pip uninstall [options] <package> ...
  C:\Program Files\Python35\python.exe -m pip uninstall [options] -r <requirements file> ...

no such option: -u

回答1:

Try

py -m pip uninstall -- -umpy

Double dashes separate options from non-options; used exactly in case like this.

BTW, I don't think -umpy is a real package. It seems it's a leftover from an unsuccessful uninstallation of a package numpy.

It could be you need to remove its directories manually. To do that, type py -m pip list -v to get a list of all installed modules together with their installation location and then simply delete the corresponding folders.

回答2:

import subprocess
print((bytes(subprocess.check_output(['pip', 'uninstall', '-umpy'], stderr=subprocess.STDOUT)).decode()))

To automate it in a python script.

来源：https://stackoverflow.com/questions/57871371/unable-to-uninstall-package-named-umpy

标签

python-3.x

pip

package

uninstall