gistfile1.py

class Human:
    def __init__(self, **kargs):
        object.__setattr__(self, '_fields', kargs)

    def __setattr__(self, name, value):
        self._fields[name] = value

    def __getattr__(self, name):
        return self._fields.get(name, None)

bob = Human(firstName="Bob", lastName="Morane")
print(bob.firstName + " " + bob.lastName)