Question

Assuming that D1 is a dictionary in Python.

Write a single statement using a BUILT_IN function to add the key:

value pair ‘RNo’: 12, if the key ‘RNo’ is not present in D1. However, if the key ‘RNo’ is present, the function should return its value.

Answer 1

D1.setdefault('RNo', 12)

The setdefault() The method checks if the key ‘RNo’ exists in the dictionary.

• If the key is not present, it inserts the key with the value 12.
• If the key is already present, it does nothing to the dictionary and simply returns the existing value.