See attached log file, please.

How to reproduce:
rem Download https://www.python.org/ftp/python/3.7.3/python-3.7.3-embed-amd64.zip
mkdir C:\Tools\Python
unzip python-3.7.3-embed-amd64.zip -d C:\Tools\Python\3.7.3
path C:\Tools\Python\3.7.3;C:\Tools\Python\3.7.3\Scripts;%PATH%
echo Remove comment in "#import site" on the last line, please.
notepad C:\Tools\Python\3.7.3\python37._pth
rem Download https://bootstrap.pypa.io/get-pip.py
python get-pip.py
Collecting pip
  Downloading https://files.pythonhosted.org/packages/5c/e0/be401c003291b56efc55aeba6a80ab790d3d4cece2778288d65323009420/pip-19.1.1-py2.py3-none-any.whl (1.4MB)
     |████████████████████████████████| 1.4MB 656kB/s
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/ec/51/f45cea425fd5cb0b0380f5b0f048ebc1da5b417e48d304838c02d6288a1e/setuptools-41.0.1-py2.py3-none-any.whl (575kB)
     |████████████████████████████████| 583kB 3.2MB/s
Collecting wheel
  Downloading https://files.pythonhosted.org/packages/96/ba/a4702cbb6a3a485239fbe9525443446203f00771af9ac000fa3ef2788201/wheel-0.33.1-py2.py3-none-any.whl
Installing collected packages: pip, setuptools, wheel
Successfully installed pip-19.1.1 setuptools-41.0.1 wheel-0.33.1

C:\Users\Hans\Downloads>pip install --log et-xmlfile.log et-xmlfile
Collecting et-xmlfile
  Downloading https://files.pythonhosted.org/packages/22/28/a99c42aea746e18382ad9fb36f64c1c1f04216f41797f2f0fa567da11388/et_xmlfile-1.0.1.tar.gz
ERROR: Command "python setup.py egg_info" failed with error code 1 in C:\Users\Hans\AppData\Local\Temp\pip-install-qws9gvg0\et-xmlfile\

et-xmlfile is not a part of CPython and this tracker is for bugs in CPython. I would suggest following up with the project repo on this and close this as third party issue.

Thank you for suggestion. I agree. Where can I find the repo for et-xmlfile or the appropriate tracker respectively, please? I have found https://github.com/dimensions11/et_xmlfile. Is it the _master_ repo?

I am not sure. Searching on PyPI gives me https://pypi.org/project/et_xmlfile/ and the homepage links to bitbucket repo that seems to be active. I am closing this issue as third party.