Python: Sort a string lexicographically

Last update on June 12 2025 12:43:24 (UTC/GMT +8 hours)

Sort string lexicographically.

Write a Python program to sort a string lexicographically.

Sample Solution:

Python Code:

# Define a function named lexicographic_sort that takes one argument, 's'.
def lexicographic_sort(s):
    # Use a nested sorting approach:
    # 1. First, sort the characters of the string 's' in ascending order.
    # 2. Then, sort the sorted characters based on their uppercase representations (case-insensitive).
    return sorted(sorted(s), key=str.upper)

# Call the lexicographic_sort function with different input strings and print the results.
print(lexicographic_sort('w3resource'))  # Output: '3ceeorrsuw'
print(lexicographic_sort('quickbrown'))  # Output: 'biknqorwuc' 

Sample Output:

['3', 'c', 'e', 'e', 'o', 'r', 'r', 's', 'u', 'w']                                                            
['b', 'c', 'i', 'k', 'n', 'o', 'q', 'r', 'u', 'w'] 

For more Practice: Solve these Related Problems:

• Write a Python program to sort the characters of a string in lexicographical order using the sorted() function.
• Write a Python program to convert a string into a sorted list of its characters and then join them back into a string.
• Write a Python program to implement lexicographical sorting of a string without using the built-in sorted() function.
• Write a Python program to use recursion to sort the characters of a string lexicographically.

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