Find repeated characters in a string in Python

In this tutorial, we will look into how to find repeated characters in a string in Python, which is a beneficial task when talking about strings and their repetition.

Most of the time, when we work on strings, we need to find the character which is repeated many times in a string.

The input and output must be in such a manner that the string is the input and the output shows the list of characters repeated.

Input- CodeSpeedy

Output- d,e

There is not a single way of doing this task, we can do it in multiple ways. Here’s the first one-

Using dictionary and for loop to find repeated characters

We will create an empty dictionary where we will store each character with its count and then we will check using a for loop if any character has more than count 1, we will print that. Here’s the snippet part-

str = "CodeSpeedy"
count = {}
for i in str:
  if i in count:
    count[i] += 1
  else:
    count[i] = 1

for j in count:
  if count[j] > 1:
    print(j, count[j])

d 2
e 3

Find and count repeated characters in a string using counter

We can also do it in another way using a counter which holds the character and its count found under Collections. Here’s the implementation-

from collections import Counter
str="CodeSpeedy"
word=Counter(str)
for i,count in word.items():
    if(count>1):
        print(i,count)

d 2
e 3

We have found the repeated characters in a string in multiple ways. I hope you like this tutorial. Thanks for reading!