Question

The function below, return_subdictionary, takes a single argument: a dictionary number_dict. The dictionary has strings as keys and integer values. The function should create and return a new dictionary that contains only the key:value pairs from the original dictionary, where the values are even numbers. Returning an empty dictionary is fine. Can you fix it?

def return_subdictionary(number_dict):
"""
Create and return a new dictionary with key:value pairs
from the original dictionary where values are even numbers.
"""
new_dict = {}
for key, value in number_dict.items():
if value % 2 == 0:
new_dict[key] = value
return new_dict

Answer 1

The function return_subdictionary creates a new dictionary that contains only the key:value pairs from the original dictionary, where the values are even numbers.

Step-by-step explanation:

The given function, return_subdictionary, takes a dictionary as an argument and creates a new dictionary that only contains key:value pairs where the values are even numbers. To accomplish this, the function iterates over each key:value pair in the original dictionary using the items() method. It checks if the value is divisible by 2 using the modulo operator (%), and if so, adds the key:value pair to the new dictionary.

For example, if the original dictionary is {'a': 3, 'b': 4, 'c': 5, 'd': 6}, the function would return {'b': 4, 'd': 6}, since the values 4 and 6 are even numbers.

The new_dict dictionary is initialized as an empty dictionary at the beginning of the function. If no even numbers are found in the original dictionary, an empty dictionary is returned as specified.