check if there are duplicates in string python code example

Example 1: python check for duplicate

def checkDuplicate(user):
    if len(set(user)) < len(user):
        return True
    return False

Example 2: python find duplicates in string

from collections import Counter

def do_find_duplicates(x):
    x =input("Enter a word = ")
    for key,val in Counter(x).items():
        print(key,val)