callable() in Python - GeeksforGeeks
https://www.geeksforgeeks.org/callable-in-python10.11.2017 · callable (object) The callable () method takes only one argument, an object and returns one of the two values: Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics. To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.