How to fix 'Command errored out with exit status 1' with pip install

Question

I'm experiencing some trouble installing pytype with pip install as shown here:

OS: CentOS 7

Python: Python 3.6

Pip: 20.0.2

$ pip3 install pytype
Collecting pytype
  Using cached pytype-2020.2.20.tar.gz (1.1 MB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: /home/aeu1/venv/bin/python3 /home/aeu1/venv/lib64/python3.6/site-packages/pip/_vendor/pep517/_in_process.py get_requires_for_build_wheel /tmp/tmp34nr30o0
       cwd: /tmp/pip-install-z9y24cb4/pytype
  Complete output (7 lines):
  running egg_info
  writing pytype.egg-info/PKG-INFO
  writing dependency_links to pytype.egg-info/dependency_links.txt
  writing entry points to pytype.egg-info/entry_points.txt
  writing requirements to pytype.egg-info/requires.txt
  writing top-level names to pytype.egg-info/top_level.txt
  error: package directory 'find:' does not exist
  ----------------------------------------
ERROR: Command errored out with exit status 1: /home/aeu1/venv/bin/python3 /home/aeu1/venv/lib64/python3.6/site-packages/pip/_vendor/pep517/_in_process.py get_requires_for_build_wheel /tmp/tmp34nr30o0 Check the logs for full command output.

Answer 1

That package directory find: comes from setup.cfg; it's actually not a package directory but an instruction for setuptools to find a list of subdirectories to install.

I successfully installed the package for Python 2.7 and 3.5. So my advice is to upgrade pip and setuptools

pip install -U pip setuptools

and then retry pip install pytype.