Python: Find the maximum length of a substring of unique character in a given string

Last update on April 22 2025 12:51:19 (UTC/GMT +8 hours)

24. Longest Uniform Substring

Write a Python program to find the maximum length of a substring in a given string where all the characters of the substring are the same. Use the itertools module to solve the problem.

Sample Solution:

Python Code:

import itertools

def max_sub_string(str1):
    return max(len(list(x)) for _, x in itertools.groupby(str1))
    
    
str1 = "aaabbccddeeeee"

print("Original string:",str1)
print("Maximum length of a substring with unique characters of the said string:")
print(max_sub_string(str1))

str1 = "c++ exercises"
print("\nOriginal string:",str1)
print("Maximum length of a substring with unique characters of the said string:")
print(max_sub_string(str1))

Sample Output:

Original string: aaabbccddeeeee
Maximum length of a substring with unique characters of the said string:
5

Original string: c++ exercises
Maximum length of a substring with unique characters of the said string:
2

For more Practice: Solve these Related Problems:

• Write a Python program to find the maximum length of a substring with identical characters using itertools.groupby.
• Write a Python program to compute the longest block of repeated characters in a string and return its length using map and max.
• Write a Python program to iterate over a string and determine the longest sequence where all characters are the same using groupby.
• Write a Python program to generate a list of uniform substrings from a string and then select the one with the maximum length.

Go to:

• Python Itertools Exercises Home ↩
• Python Exercises Home ↩

Previous: Write a Python program to find the shortest distance from a specified character in a given string. Return the shortest distances through a list and use itertools module to solve the problem.

Python Code Editor:

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