Python: Check if a function is a user-defined function or not

Python module: Exercise-1 with Solution

Write a Python program to check if a function is a user-defined function or not. Use types.FunctionType, types.LambdaType()

Sample Solution:

Python Code:

import types
def func(): 
    return 1

print(isinstance(func, types.FunctionType))
print(isinstance(func, types.LambdaType))
print(isinstance(lambda x: x, types.FunctionType))
print(isinstance(lambda x: x, types.LambdaType))
print(isinstance(max, types.FunctionType))
print(isinstance(max, types.LambdaType))
print(isinstance(abs, types.FunctionType))
print(isinstance(abs, types.LambdaType))

Sample Output:

True
True
True
True
False
False
False
False

Flowchart:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Python module Exercises Home.
Next: Write a Python program to check if a given value is a method of a user-defined class.