ImportError: No module named 'Cython'

PythonWindowsPipCython

Python Problem Overview

I'm trying do from Cython.Build import cythonize and I get the message ImportError: No module named 'Cython', but I instaled the Cython with the comand pip install Cython. What's wrong?

Python 3.5 Cython 0.25.2 Windows 8

Python Solutions

Solution 1 - Python

just directly install from pypi: pip install Cython
https://pypi.org/project/Cython/

Solution 2 - Python

Use Pip3 command:

pip3 install --upgrade cython

Solution 3 - Python

I reinstalled the Cython with conda and install the Microsoft Visual C++ Build Tools and it works fine.

Solution 4 - Python

You can download the the newest Cython release from http://cython.org/ or you can directly download by clicking this link here Unpack the tarball or zip file, enter the directory, and then run:

python setup.py install

Solution 5 - Python

The problem for me was the pip version. Running python -m pip install pip --upgrade solved the issue.

Solution 6 - Python

it should be path problem. go to windows search for python idle right click idle - open file location where right click on python.exe - open file location if the module not in that location type cmd and press enter in path now install module with pip install cython it will work fine

Solution 7 - Python

I personally ran into this problem when I was trying to set up a new virtual environment. I simply installed Cython with python -m pip install Cython and then proceeded to install all the rest of my stuff I needed with python -m pip install -r requirements.txt. Once it was done, it actually uninstalled Cython for me... Why? Heck do I know... I ain't that kind of expert :<

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