Error running either python3 setup.py install "TypeError: must be str, not NoneType"

I just installed an API pyunicorn and when I import it I get an error. It tells me that it cannot import setup. Therefore, I went to install setup.py. My steps were: First:

cd /home/user/python-3.7.2/

Second:

python3 setup.py install or pip3 install .

It gives the following error:

Obtaining file:///home/user/Python-3.7.2
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/home/marlon/Python-3.7.2/setup.py", line 30, in <module>
        set_compiler_flags('LDFLAGS', 'PY_LDFLAGS_NODIST')
      File "/home/marlon/Python-3.7.2/setup.py", line 27, in set_compiler_flags
        sysconfig.get_config_vars()[compiler_flags] = flags + ' ' + py_flags_nodist
    TypeError: must be str, not NoneType
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /home/user/Python-3.7.2/

How to solve it?

[McSinyx]

You’re welcome. We humans make mistakes all the time (I’d argue that it is one of the things that makes us humans 😄), so don’t let others’ mistake let you down, take it as opportunity to learn from (e.g. about Python packaging in this case 😉). In your very case you might want to install an older version (0.6.0.post1) until it gets fixed.

[marlon-shiftone]

Hey I just fixed it. I have to thank you very much.

The source of error was: “[T]he line in question is referring to version from the setup.py file […] doesn’t exist in the site-packages package.” from here.

Solution:

I’ve copied the script in setup.py and remove the line containing from setup import __version__ by creating a new file __init__py. Then I’ve removed the old one and replace by the one I’ve created. And it worked! 😄

Happy!