Update Python wrappers
Update Python wrappers

We forgot to update them with the change to `vec_basic` in
d7022296b26af4350f1e67211ff9d39394500bc9.

bjodah/symengine.py,bjodah/symengine.py,symengine/symengine.py,symengine/symengine.py,bjodah/symengine.py,symengine/symengine.py