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

Python Itertools: Exercise-24 with Solution

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

Python Code Editor:


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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.

Next: Write a Python program to find the first two elements of a given list whose sum is equal to a given value. Use itertools module to solve the problem.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m