Allow python shell to interact with system variables

[HDavidBarth]

If there was a way for the python shell to access the variables used in calculator mode that would be amazing. I have some matrices I am working with in calculator mode, and wish to be able to use fancy python functions to manipulate the matrices. However, at the moment it doesn't seem to be possible.

I am hoping I can access a matrix from the calculator using my python script, and then save a new matrix into the calculator function.