Is there any way to check if a function is user-defined?

[Crimson King]

If by user-defined functions you mean functions that you've written yourself in your current file, like:

def myfunc(): pass

Then having a print statement could be of some help:

import types
print [f.__name__ for f in globals().values() if type(f) == types.FunctionType]

That statement will print the name of all type 'function' objects.

The thing is, if you import a function directly from a module:

from requests import get

The get function from the requests module will now be listed in the previously mentioned print statement.

PS: in my print statement, it should read f.__name__