mechanize 0.4.8 doesn't install correctly on raspberry pi

[wvanhed]

Installing mechanize 0.4.8 via pip on a raspberry pi running Debian Bullseye with python 3.9 doesn't as expected.
However, installing 0.4.7 is successful, so likely there is something missing in the 0.4.8 distribution package.

Details (1): Installing mechanize with pip

(venvtest) pi@mango:~/MyProject/myproj $ pip --version
pip 20.3.4 from /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages/pip (python 3.9)

(venvtest) pi@mango:~/MyProject/myproj $ pip install mechanize
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting mechanize
Using cached https://www.piwheels.org/simple/mechanize/mechanize-0.4.8-py2.py3-none-any.whl (5.1 kB)
Requirement already satisfied: html5lib>=0.999999999 in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from mechanize) (1.1)
Requirement already satisfied: webencodings in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from html5lib>=0.999999999->mechanize) (0.5.1)
Requirement already satisfied: six>=1.9 in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from html5lib>=0.999999999->mechanize) (1.16.0)
Installing collected packages: mechanize
Successfully installed mechanize-0.4.8


(venvtest) pi@mango:~/MyProject/myproj $ pip list
Package       Version
------------- -------
html5lib      1.1
mechanize     0.4.8
pip           20.3.4
pkg-resources 0.0.0
setuptools    44.1.1
six           1.16.0
webencodings  0.5.1
wheel         0.34.2

Details (2): Package folder missing in sitelibs

(venvtest) pi@mango:~/MyProject/myproj/ $ ls venvtest/lib/python3.9/site-packages
easy_install.py            pip-20.3.4.dist-info            __pycache__                   six.py                        wheel
html5lib                   pip-20.3.4.virtualenv           setuptools                    _virtualenv.pth               wheel-0.34.2.dist-info
html5lib-1.1.dist-info     pkg_resources                   setuptools-44.1.1.dist-info   _virtualenv.py                wheel-0.34.2.virtualenv
mechanize-0.4.8.dist-info  pkg_resources-0.0.0.dist-info   setuptools-44.1.1.virtualenv  webencodings
pip                        pkg_resources-0.0.0.virtualenv  six-1.16.0.dist-info          webencodings-0.5.1.dist-info

Details (3): As a consequence, importing mechanize doesn't work

(venvtest) pi@mango:~/MyProject/myproj $ python
Python 3.9.2 (default, Mar 12 2021, 04:06:34)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import mechanize
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'mechanize'
>>> exit()

See https://stackoverflow.com/a/72760801/50899

[kovidgoyal]

You are probably running pip from a different python than python 3.9

[wvanhed]

You are probably running pip from a different python than python 3.9

I first thought so too, but I am 99% sure that's not the case. That's why I checked and included the pip --version output already in my ticket:

(venvtest) pi@mango:~/MyProject/myproj $ pip --version
 pip 20.3.4 from /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages/pip (python 3.9)

Also, why would mechanize 0.4.7 install successfully then?

I also tried earlier installing from source (instead of from wheel), using pip install --no-binary :all: mechanize, but that didn't help either.

[kovidgoyal]

In that case, it's probably caused by this #73 I'm afraid I dont have the time or interest to debug all the various permutations of shit that the python packaging ecosystem produces. The pull request is correct in that the new behavior matches the documented interface of setup.cfg. If the documented interface breaks with whatever packaging tools are present in your system, its a bug there.

I suggest you simply cut pip out and download the source tarball, untar it and move the mechanize folder into site-packages yourself.

[wvanhed]

Fair enough; thanks for the reply.