Installation fails with "python setup.py egg_info" when

[ChatBotMatt]

When installing the requirements via "pip install -r requirements.txt" after activating the venv, I get the below error.

I was able to fix it following the advice of https://stackoverflow.com/questions/35104097/how-to-install-psycopg2-with-pg-config-error, but it'd be handy if it worked "out of the box", e.g. if this could be added as a dependency.

Collecting psycopg2-binary==2.8.5
  Downloading psycopg2-binary-2.8.5.tar.gz (381 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 381.7/381.7 KB 9.3 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error
  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      running egg_info
      creating /tmp/pip-pip-egg-info-vkrr4ivr/psycopg2_binary.egg-info
      writing /tmp/pip-pip-egg-info-vkrr4ivr/psycopg2_binary.egg-info/PKG-INFO
      writing dependency_links to /tmp/pip-pip-egg-info-vkrr4ivr/psycopg2_binary.egg-info/dependency_links.txt
      writing top-level names to /tmp/pip-pip-egg-info-vkrr4ivr/psycopg2_binary.egg-info/top_level.txt
      writing manifest file '/tmp/pip-pip-egg-info-vkrr4ivr/psycopg2_binary.egg-info/SOURCES.txt'
      Error: pg_config executable not found.
      pg_config is required to build psycopg2 from source.  Please add the directory
      containing pg_config to the $PATH or specify the full executable path with the
      option:
          python setup.py build_ext --pg-config /path/to/pg_config build ...
      or with the pg_config option in 'setup.cfg'.
      If you prefer to avoid building psycopg2 from source, please install the PyPI
      'psycopg2-binary' package instead.
      For further information please check the 'doc/src/install.rst' file (also at
      <https://www.psycopg.org/docs/install.html>).
      [end of output]
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[rsanimesh]

As said in the error, use and "pip install psycopg2-binary" and remove "psycopg2-binary==2.8.5" from the requirement.txt

[ChatBotMatt]

I appreciate that the error message says to do that, but my point is that the requirements.txt should be valid if this is a consistent error.