inspect.getmembers in order?

Question

inspect.getmembers(object[, predicate])

Return all the members of an object in a list of (name, value) pairs sorted by nam

Answer 1

You can use the builtin function vars() as an alternative for inspect.getmembers that returns members in the order they were defined:

>>> class RegisterForm:
...     username = ""
...     password1 = ""
...     password2 = ""
...     first_name = ""
...     last_name = ""
...     address = ""
...
>>> list(vars(RegisterForm).keys())
['__module__', 'username', 'password1', 'password2', 'first_name', 'last_name', 'address', '__doc__']

This works starting with CPython 3.6 and all other Python implementations starting with Python 3.7, because dicts are now ordered by insertion, which means the underlying __dict__ property of a class (which is what vars() returns) is ordered.