I'm writing python code and stuck trying to call a python module. I'm on OS X.

From what I've read Houdini uses the systems python - 2.7 in my case.

I wish to call pandas with and “import pandas” command but I'm getting “No module named pandas” error and stumped by this.
Using pip I can easily install pandas to my system python, it imports fine. But it seems Houdini has its own python instance somewhere else. How do I install modules to Houdini's python?

I've figured it out. In a shell type:
Every version of Houdini has its own directory so you'll have to change the Houdini18.0.400 above to match your install.