CBSE Class 12 Computer Science — Python Dictionaries

(a) Write a Python expression to check if the key, 'RNo' is present in D1. OR (b) Write a Python expression to check if any key in D1 has a value 12.

(a) 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. OR (b) Write a single statement to delete all the elements from D1.