Python and pip

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Background

Sometimes we may run into annoying bugs or problems, and a hint on what’s probably going wrong is valuable.

TypeError: ‘module’ object is not callable

This error may shows up when you use pip on the command line, e.g. pip show numpy.

This error maybe result from a installation of pip to the system level, then install or upgrade pip with –user argument to user level.

To fix

run python -m pip uninstall pip to uninstall current pip, then we will fall back to the old pip on system level.

ModuleNotFoundError: No module named ‘_pydevd_bundle.pydevd_cython’

This error may happen when using PyCharm debugger. The reason is probably that you have a python package with a name conflicts with that of debugger, e.g. “code”.

To fix

rename your personal python packages.

To be continued

Written on October 23, 2019