"Undefined variable "py" or class" when trying to load Python from MATLAB R2014b?

Question

def c1(a1,b1):
    a1=2
    b1=3
    cc=a1+b1
    return cc

I have saved this function in test.py. When I use this function in MATLAB I encountered this problem:

import py.test.* c1(2,3)
Undefined function 'c1' for input arguments
of type 'double'.
  py.test.c1(2,3)
Undefined variable "py" or class
"py.test.c1".

How can I use .py function in MATLAB R2014b？

Answer 1

If you get the error message below, a failure has occurred.

Undefined variable "py" or class

There are a lot of things that might be wrong here, and Mathworks have actually set up a whole tutorial for how to troubleshoot this problem. (The title of the page is actually: Undefined variable "py" or function "py.command", so it should contain most of what you need)

Check out the following:

• Python Not Installed
• 64-bit/32-bit Versions of Python on Windows Platforms
• MATLAB Cannot Find Python
• Error in User-Defined Python Module
• Python Module Not on Python Search Path
• Module Name Conflicts
• Python Tries to Execute command in Wrong Module