Trying to get fHDHR working Ubuntu 18. During the install I get this error:
include/python3.8 -c src/gevent/libev/corecext.c -o build/temp.linux-x86_64-3.8/src/gevent/libev/corecext.o
  src/gevent/libev/corecext.c:95:10: fatal error: Python.h: No such file or directory
   #include "Python.h"
            ^~~~~~~~~~
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  ----------------------------------------
  Failed building wheel for gevent
Most answers I find tell me I need python-dev installed but it already is (and updated).  In this post it was recommended to    sudo pip install mmh3   which I tried but it also failed as unable to find python.h
Any idea what I am missing on my system?
 
     
     
     
    