PYTHON Write a function please. Upvote for Quick response. Thank you.

Write a function that accepts a dictionary whose keys and values are strings as its parameter and returns True if no two keys or more map to the same value, otherwise, return false. Create a dictionary in your program and test the function. Sampe output for dictionary: {"Marty': '206-9024', 'Hawking': '123-4567', 'Smith': '949-0504', 'Newton': '123-4567'} two or more keys map to the same value sample output for dictionary: {"Marty': '206-9024', 'Hawking': '555-1234''Smith': '949-0504', 'Newton': '123-4567"} no two keys map to the same value