import types
class CL:
def m1():
print(m1())
def m2():
print(m2())
def f():
print(f())
print(isinstance(CL().m1, types.MethodType))
print(isinstance(CL().m2, types.MethodType))
print(isinstance(f, types.MethodType))
print(isinstance(max, types.MethodType))
'''
run:
True
True
False
False
'''