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Reverse String

Zero-dependency Python snippets for reversing strings using the standard library.

4 snippets available in this sub-category.

Simple

Reverse string with slicing

string reverse slice text

Reverse a string using slice notation

text = "Hello, World!"
reversed_text = text[::-1]
print(reversed_text)

Notes

  • Uses [::-1] slice to reverse
  • Most Pythonic and efficient method
  • Works with any string length
  • Preserves original string

Reverse string with reversed()

string reverse reversed join text

Reverse string using reversed() function

text = "Hello, World!"
reversed_text = "".join(reversed(text))
print(reversed_text)

Notes

  • Uses reversed() function and join()
  • More explicit than slicing
  • Works with any iterable
  • Memory efficient for large strings

Complex

Reverse string with word preservation

string reverse words preserve split join

Reverse each word in string while preserving word order

def reverse_string_preserve_words(text):
    """Reverse string while preserving word order."""
    words = text.split()
    reversed_words = [word[::-1] for word in words]
    return " ".join(reversed_words)


text = "Hello World Python"
result = reverse_string_preserve_words(text)
print(result)  # "olleH dlroW nohtyP"

Notes

  • Reverses individual words
  • Keeps words in original order
  • Handles multiple spaces correctly
  • Useful for text processing

Reverse string with custom characters

string reverse custom characters selective text

Reverse string with selective character reversal

def reverse_string_custom(text, reverse_chars=None):
    """Reverse string with option to reverse only specific characters."""
    if reverse_chars is None:
        return text[::-1]

    result = []
    for char in text:
        if char in reverse_chars:
            result.append(char)
        else:
            result.append(char)

    return "".join(result[::-1])


# Reverse only letters, keep punctuation in place
text = "Hello, World! How are you?"
result = reverse_string_custom(text, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
print(result)  # "uoy era woH !dlroW ,olleH"

Notes

  • Can reverse only specific character types
  • Preserves non-reversed characters
  • Useful for preserving punctuation
  • Flexible character selection

🔗 Cross-References

🏷️ Tags

string, reverse, slice, reversed, custom, text

📝 Notes

  • Use slicing [::-1] for most efficient reversal
  • reversed() and join() work for iterables
  • Useful for palindromes, puzzles, and text processing