Support PEP8 recommended function, method, and class formatted names

[moorepants]

For backward compatibility I'd like to dual support:

• problem -> Problem
• problem.addOption() -> Problem.add_option()
• problem.setProblemScaling() -> Problem.set_problem_scaling() or Problem.set_scaling()

So ipopt/__init__.py would have:

from cyipopt import Problem
problem = Problem

And there would be dual methods:

class Problem():
    def add_option(...):
        # all functional code here
    def addOption(self, *args, **kwargs):
        # maybe add a deprecation warning here
        self.add_option(*args, **kwargs)

[brocksam]

Is this still of interest? I'm keen to get involved and this issue looks like it'd be a good place to start.

[moorepants]

This is, the only thing is that we'd want to deprecate them method names, so have both for some time.

[brocksam]

This is, the only thing is that we'd want to deprecate them method names, so have both for some time.

Yup, understood. Will follow your suggestion for dual support with deprecation warnings for the old non-PEP8 style.

[moorepants]

Cool, thanks for helping :)