gistfile1.py

import sys
import inspect
import re

def alias(obj) :
    rename_regexp = re.compile(r"([a-z0-9])([A-Z])")
    make_name = ( lambda name : re.sub(rename_regexp, r"\1_\2", name).lower() )
    if inspect.isclass(obj) :
        names_list = dir(obj)
        for name in names_list :
            if name.startswith("_") :
                continue
            pep8_name = make_name(name)
            if name != pep8_name :
                if not getattr(obj, pep8_name, None) is None :
                    raise RuntimeError("Cannot create PEP8 alias: %s.%s -> %s.%s (destination is already exists)" % (
                        obj.__name__, name, obj.__name__, pep8_name ))
                setattr(obj, pep8_name, getattr(obj, name))
    elif inspect.isfunction(obj) :
        module = sys.modules[obj.__module__]
        pep8_name = make_name(obj.__name__)
        if obj.__name__ != pep8_name :
            if not getattr(module, pep8_name, None) is None :
                raise RuntimeError("Cannot create PEP8 alias: %s.%s -> %s.%s (destination is already exists)" % (
                    obj.__module__, obj.__name__, obj.__module__, pep8_name ))
            setattr(module, pep8_name, obj)
    else:
        raise RuntimeError("Invalid PEPped object: %s" % (obj))
    return obj

@alias
class Foo :
    def fooBar(self) : pass
    def xxx_yyy(self) : pass

@alias
def testMethod() :
    print("test")

testMethod()
test_method()