What are first class objects in Python?

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What entities are called first-class objects in Python? Also, I want to know why are they called first class.
Aug 2 in Python by Neel
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1 answer to this question.

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First-class objects in a language are handled uniformly throughout. They may be stored in data structures, passed as arguments, or used in control structures. A programming language is said to support first-class functions if it treats functions as first-class objects. Python supports the concept of First Class functions.

Properties of first-class functions:

  • A function is an instance of the Object type.
  • You can store the function in a variable.
  • You can pass the function as a parameter to another function.
  • You can return the function from a function.
  • You can store them in data structures such as hash tables, lists, …

Python functions are first-class objects. In the example below, we are assigning a function to a variable. This assignment doesn’t call the function. It takes the function object referenced by shout and creates a second name pointing to it, yell.

# Python program to illustrate functions can be treated as objects

def shout(text):

    return text.upper()

  

print shout('Hello')

  

yell = shout

  

print yell('Hello')
Output

HELLO
HELLO
answered Aug 2 by Arvind
• 2,960 points

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