Pip install fails with ImportError: No module named Cython.Distutils

[mhidas]

pip doesn't seem able to install cf-units 2.0.1:

$ pip install cf-units
Collecting cf-units
  Using cached https://files.pythonhosted.org/packages/0c/01/32ac56ae9977baf05dca9b3c563c96118b4204dff5161ce5ec58113b649c/cf_units-2.0.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-hajt1m/cf-units/setup.py", line 6, in <module>
        from Cython.Distutils import build_ext
    ImportError: No module named Cython.Distutils

[pelson]

Thanks @mhidas. Naturally, pip install cython addresses the problem in the short term.
In the slightly longer-term, cf_units needs to implement it's setup.py a little more carefully to handle the case when cython is not already installed.

[pelson]

Relates to active discussion at pypa/setuptools#1317 (comment). Looks like there will be a new approach in the pipeline over the next 18 months. In the meantime, I'll try getting our setup_requires working appropriately.

[pelson]

I've opened #108 to fix this. It should go into v2.0.2 if we decide to go down that approach.

Thanks for the report @mhidas.

[mhidas]

Thanks for the fix!

[hengqiali]

Thanks @mhidas. Naturally, pip install cython addresses the problem in the short term.
In the slightly longer-term, cf_units needs to implement it's setup.py a little more carefully to handle the case when cython is not already installed.

Thanks!It works for me to 'No Module named Cython'

[rzr]

or update pip as suggested at;

rzr/sense-hat-webthing#3 (comment)

CellProfiler/centrosome#78

[MISSIVA20]

from Cython.Build import cythonize
ModuleNotFoundError: No module named 'Cython'
i have this error,
i make this cmd:
pip install --upgrade cython
and pip install cython
python PythonAPI/setup.py build_ext install
but i have same error do you have a solution