Python on osx, Why can't it see the libraries?

Question

I'm a little confused.

I have two machines running OSX Yosemite.

I have installed certain python libraries using pip

Now on one, these have wound up in /Library/Python/2.7/site-packages

And they perform exactly as expected.

On the other, they have found their way into /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages

Now, on that machine, if I run a script that imports these libraries directly from the command line, it fails to find them.

So

Myscript.py  

fails (with an importError)

But, if I run it as a parameter to a call to python, that's fine

python MyScript.py

works as expected.

I've compared the sheband with the path I get from

whereis python

and they match.

What might be causing this discrepancy?

thanks

Answer 1

Well I've half found the answer, two different versions of python are running. Which then begs the question, why?

i've put that into a new, more focused question here

Why is OSX not running the python I get with whereis python