Problems with python3 pip
Chad Dougherty
crd@acm.org
Sun Apr 3 16:57:02 GMT 2022
On 2022-03-28 09:36, Chad Dougherty wrote:
> It seems to me like the ensurepip module has some problems. Shouldn't
> the following be working?
>
> $ cygcheck -c -d|grep python3
> python3 3.9.10-1
> python3-devel 3.9.10-1
> python39 3.9.10-1
> python39-devel 3.9.10-1
> python39-pip 21.3.1-3
> python39-setuptools 59.5.0-1
> $ type python3.9
> python3.9 is hashed (/usr/bin/python3.9)
> $ type pip3.9
> pip3.9 is hashed (/usr/bin/pip3.9)
> $ pip3.9 --version
> pip 21.3.1 from /usr/lib/python3.9/site-packages/pip (python 3.9)
> $ pip3.9 list
> Package Version
> ---------- -------
> pip 21.3.1
> setuptools 59.5.0
> WARNING: You are using pip version 21.3.1; however, version 22.0.4 is
> available.
> You should consider upgrading via the '/usr/bin/python3.9.exe -m pip
> install --upgrade pip' command.
>
> $ python3.9 -m ensurepip
> Traceback (most recent call last):
> File "/usr/lib/python3.9/runpy.py", line 188, in _run_module_as_main
> mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
> File "/usr/lib/python3.9/runpy.py", line 147, in _get_module_details
> return _get_module_details(pkg_main_name, error)
> File "/usr/lib/python3.9/runpy.py", line 111, in _get_module_details
> __import__(pkg_name)
> File "/usr/lib/python3.9/ensurepip/__init__.py", line 30, in <module>
> _SETUPTOOLS_VERSION = _get_most_recent_wheel_version("setuptools")
> File "/usr/lib/python3.9/ensurepip/__init__.py", line 27, in
> _get_most_recent_wheel_version
> return str(max(_wheels[pkg], key=distutils.version.LooseVersion))
> ValueError: max() arg is an empty sequence
> $ python3.9 -m ensurepip --user
> Traceback (most recent call last):
> File "/usr/lib/python3.9/runpy.py", line 188, in _run_module_as_main
> mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
> File "/usr/lib/python3.9/runpy.py", line 147, in _get_module_details
> return _get_module_details(pkg_main_name, error)
> File "/usr/lib/python3.9/runpy.py", line 111, in _get_module_details
> __import__(pkg_name)
> File "/usr/lib/python3.9/ensurepip/__init__.py", line 30, in <module>
> _SETUPTOOLS_VERSION = _get_most_recent_wheel_version("setuptools")
> File "/usr/lib/python3.9/ensurepip/__init__.py", line 27, in
> _get_most_recent_wheel_version
> return str(max(_wheels[pkg], key=distutils.version.LooseVersion))
> ValueError: max() arg is an empty sequence
> $
>
>
> This causes the failure of "-m venv", which is what I ultimately want to
> do:
> $ python3.9 -m venv /home/crd/testvenv
> Error: Command '['/home/crd/testvenv/bin/python3.9.exe', '-Im',
> 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit
> status 1.
>
> I also tried python38 and had similar problems.
>
> Thanks...
>
The problem appears to be that the python-pip-wheel and
python-setuptools-wheel packages were not installed on my system.
Apparently they were a requirement for the python35 packages but that
requirement was removed in python36 and later. At some point in the
past when I removed python35, I was also able to remove python-pip-wheel
and python-setuptools-wheel which got me into this problem.
After reinstalling python-pip-wheel and python-setuptools-wheel,
ensurepip and venv are both working from python39.
It seems to me like python-pip-wheel and python-setuptools-wheel should
probably be re-added as dependencies for newer python3 packages.
Thanks...
--
-Chad
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