Azure Functions: Python - import cython dependent module

Question

Hello,

I want to import a module [ZigZag] which has a cython dependency, due to this dependency deployment breaks as Cython is not pre-installed in Azure Functions host, putting Cython in my 'requirements.txt' file doesn't help as pip installs somewhat in parallel. I have also tried doing a pip install from my python script (after installing cython through 'requirements.txt' file), this still doesn't work.

Can anyone provide a work-around?

I believe this issue will pop-up as more users deploy python functions since cython is quite necessary for many modules.

Answer 1

Hi @Jude Ob

I can see that the latest version for ZigZag is 0.2.2 and the supported python version is 3.5: https://pypi.org/project/ZigZag/
The azure function supports 3.6 and above python version which will make it incompatible. You can try installing the latest cython using requirements.txt and it will work as expected. But when you try to install ZigZaG it tries to find the dependency of cython package (Cython==0.26.1) that is compatible with it therefor it throws the error that cython package not found.

The same observation will be there when you try to install the zigzag in your local machine with 3.6 and above version.

Answer 2

Hi @Jude Ob ,

I'm on the same boat here. You were able to overcome this issue?

Answer 3

Hi there,

Can someone suggest what is the resolution please?