AIX Open Source

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  • 1.  Python3 PIP error

    Posted Tue December 07, 2021 02:06 PM

    I am new to open source packaging on AIX.  Some background, server is at AIX 7100-05-04, with YUM configured to manage RPM packages.

    I have installed some python modules in the past, without much issue, but am using this - Installing and configuring Python machine learning packages on IBM AIX – IBM Developer -  to add Pandas.  I've encountered a number of issues after installing the requisite RPM packages.  After a fair amount of research, I determined the libiconv RPM was backlevel.  Once updated, I stopped seeing the errors that was causing NumPy to fail. 

    Now, I appear to have run into this:

    root@akxferp2:/opt/freeware/bin> python3 -m pip install numpy
    Traceback (most recent call last):
    File "/opt/freeware/lib64/python3.7/", line 193, in _run_module_as_main
    "__main__", mod_spec)
    File "/opt/freeware/lib64/python3.7/", line 85, in _run_code
    exec(code, run_globals)
    File "/opt/freeware/lib/python3.7/site-packages/pip/", line 23, in <module>
    from pip._internal.cli.main import main as _main # isort:skip # noqa
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/cli/", line 10, in <module>
    from pip._internal.cli.autocompletion import autocomplete
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/cli/", line 9, in <module>
    from pip._internal.cli.main_parser import create_main_parser
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/cli/", line 7, in <module>
    from pip._internal.cli import cmdoptions
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/cli/", line 24, in <module>
    from pip._internal.cli.progress_bars import BAR_TYPES
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/cli/", line 12, in <module>
    from pip._internal.utils.logging import get_indentation
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/utils/", line 18, in <module>
    from pip._internal.utils.misc import ensure_dir
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/utils/", line 31, in <module>
    from pip._internal.locations import (
    File "/opt/freeware/lib/python3.7/site-packages/pip/_internal/locations/", line 9, in <module>
    from pip._internal.models.scheme import SCHEME_KEYS, Scheme
    ImportError: cannot import name 'SCHEME_KEYS' from 'pip._internal.models.scheme' (/opt/freeware/lib/python3.7/site-packages/pip/_internal/models/

    I have come across a couple recommendations to create a "virtual environent" for this install. I am hoping someone can confirm this is the solution to the above.  In addition,  I am unfamiliar with what it means to create a virtual environment for python, accessibility, etc... If anyone is able to point me to useful documentation on the subject, I'd be grateful.  


    Thomas Crucian

  • 2.  RE: Python3 PIP error

    Posted Wed December 08, 2021 02:44 AM

    Looks like pip is updated manually and then python3 rpm is updated. 
    Pip & setuptools bundled with python3 main rpm may not be the latest most of the time since pip & setuptools are updated frequently. 
    So in this case, it is out of sync. You can remove the locations directory "/opt/freeware/lib/python3.7/site-packages/pip/_internal/locations" and try again.

    In the future , we are planning to provide pip & setuptools as a separate rpm which will avoid these kind of problems.

    Ayappan P

  • 3.  RE: Python3 PIP error

    Posted Wed December 08, 2021 02:52 AM

    The more clean way to fix the problem is to remove the pip & setuptools in "/opt/freeware/lib/python3.7/site-packages" and invoke ensurepip which will install the python3 bundled pip & setuptools.  

    rm -rf /opt/freeware/lib/python3.7/site-packages/pip*
    rm -rf /opt/freeware/lib/python3.7/site-packages/setuptools*

    python3 -m ensurepip 

    Ayappan P

  • 4.  RE: Python3 PIP error

    Posted Wed December 08, 2021 09:48 AM
    Thanks for the help.  I had a suspicion I had caused this issue and had attempted an over-write install of Python3 which had no impact.  After continuing to troubleshoot, I was more convinced I'd created a problem with pip.  However, I took a hammer approach, uninstalling Python3 and deleting the folder from /opt/freeware/bin/.  I re-installed python3, updated pip, and that resolved my issue.  

    I will make note of your solution but hopefully I avoid the self-inflicted conflict in the future.

    Thomas Crucian