Trouble under Windows

[tester0077]

Being relatively new to Docker, I just tried to build a test container for an app with
docker build -t wpet .
in a directory with the given Dockerfile

the last of the output:```

[4/4] RUN pip install -U -f https://extras.wxpython.org/wxPython4/extras/linux/gtk3/debian-9 wxPython:
#7 1.237 Looking in links: https://extras.wxpython.org/wxPython4/extras/linux/gtk3/debian-9
#7 2.445 Collecting wxPython
#7 2.528 Downloading wxPython-4.2.0.tar.gz (71.0 MB)
#7 13.42 ERROR: Command errored out with exit status 1:
#7 13.42 command: /usr/local/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-zxcszj9u/wxPython/setup.py'"'"'; file='"'"'/tmp/pip-install-zxcszj9u/wxPython/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-zxcszj9u/wxPython/pip-egg-info
#7 13.42 cwd: /tmp/pip-install-zxcszj9u/wxPython/
#7 13.42 Complete output (7 lines):
#7 13.42 Traceback (most recent call last):
#7 13.42 File "", line 1, in
#7 13.42 File "/tmp/pip-install-zxcszj9u/wxPython/setup.py", line 27, in
#7 13.42 from buildtools.config import Config, msg, opj, runcmd, canGetSOName, getSOName
#7 13.42 File "/tmp/pip-install-zxcszj9u/wxPython/buildtools/config.py", line 30, in
#7 13.42 from attrdict import AttrDict
#7 13.42 ModuleNotFoundError: No module named 'attrdict'
#7 13.42 ----------------------------------------
#7 13.70 ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.#7 14.76 WARNING: You are using pip version 20.0.2; however, version 22.3.1 is available.
#7 14.76 You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.

Any tips on where I am going wrong?

[tester0077]

After actually trying to run the test project, it seems that wxPython was installed despite the error messages.
Hence disregard my question.