w3resource

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:

Flowchart: Check if a function is a user-defined function or not.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


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.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.

Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

def tips_collect_dictionary(obj):
  inv_obj = {}
  for key, value in obj.items():
    inv_obj.setdefault(value, list()).append(key)
  return inv_obj
ages = {
  "Owen": 25,
  "Jhon": 25,
  "Pepe": 15,
}
print(tips_collect_dictionary(ages))

Output:

{25: ['Owen', 'Jhon'], 15: ['Pepe']}

 

We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook