🔁 50+ Python String Methods & Examples 📝

1. lower() – Convert string to lowercase

"HELLO".lower()  # Output: "hello"

2. upper() – Convert string to uppercase

"hello".upper()  # Output: "HELLO"

3. strip() – Remove leading & trailing whitespace

" hello ".strip()  # Output: "hello"

4. lstrip() – Remove leading spaces

"  hello".lstrip()  # Output: "hello"

5. rstrip() – Remove trailing spaces

"hello  ".rstrip()  # Output: "hello"

6. replace() – Replace a substring

"apple".replace("a", "A")  # Output: "Apple"

7. split() – Split string into a list

"a,b,c".split(",")  # Output: ['a','b','c']

8. rsplit() – Split from the right

"a,b,c".rsplit(",", 1)  # Output: ['a,b','c']

9. splitlines() – Split string by lines

"Hello\nWorld".splitlines()  # Output: ['Hello','World']

10. join() – Join list into string

" ".join(["I", "love", "Python"])  # Output: "I love Python"

11. find() – Find substring index (-1 if not found)

"hello".find("e")  # Output: 1

12. rfind() – Find substring from the right

"hello".rfind("l")  # Output: 3

13. index() – Find substring index (raises error if not found)

"hello".index("e")  # Output: 1

14. rindex() – Find substring index from right

"hello".rindex("l")  # Output: 3

15. count() – Count occurrences of a substring

"hello".count("l")  # Output: 2

16. startswith() – Check string prefix

"Python".startswith("Py")  # Output: True

17. endswith() – Check string suffix

"Python".endswith("on")  # Output: True

18. isdigit() – Check if all characters are digits

"123".isdigit()  # Output: True

19. isalpha() – Check if all characters are letters

"Python".isalpha()  # Output: True

20. isalnum() – Check if alphanumeric

"Python123".isalnum()  # Output: True

21. isupper() – Check if all letters are uppercase

"HELLO".isupper()  # Output: True

22. islower() – Check if all letters are lowercase

"hello".islower()  # Output: True

23. istitle() – Check if string is title cased

"Hello World".istitle()  # Output: True

24. isspace() – Check if string is whitespace

"   ".isspace()  # Output: True

25. title() – Convert string to title case

"hello world".title()  # Output: "Hello World"

26. capitalize() – Capitalize first letter

"python".capitalize()  # Output: "Python"

27. swapcase() – Swap upper/lower case

"Hello".swapcase()  # Output: "hELLO"

28. center() – Center string with padding

"Python".center(10, "*")  # Output: "**Python**"

29. ljust() – Left justify with padding

"Python".ljust(10, "-")  # Output: "Python----"

30. rjust() – Right justify with padding

"Python".rjust(10, "-")  # Output: "----Python"

31. zfill() – Pad numeric string with zeros

"42".zfill(5)  # Output: "00042"

32. partition() – Split string into tuple by separator

"hello world".partition(" ")  # Output: ('hello', ' ', 'world')

33. rpartition() – Partition from right

"hello world".rpartition(" ")  # Output: ('hello', ' ', 'world')

34. expandtabs() – Replace tabs with spaces

"Hello\tWorld".expandtabs(4)  # Output: "Hello   World"

35. encode() – Encode string to bytes

"hello".encode("utf-8")  # Output: b'hello'

36. decode() – Decode bytes to string

b"hello".decode("utf-8")  # Output: "hello"

37. format() – Insert values into string

"My name is {}".format("Alice")  # Output: "My name is Alice"

38. format_map() – Format using a dictionary

"My name is {name}".format_map({"name": "Bob"})  # Output: "My name is Bob"

39. encode() – Encode string in specified encoding

"hello".encode("ascii")  # Output: b'hello'

40. removeprefix() – Remove starting substring (Python 3.9+)

"PythonTutorial".removeprefix("Python")  # Output: "Tutorial"

41. removesuffix() – Remove ending substring (Python 3.9+)

"PythonTutorial".removesuffix("Tutorial")  # Output: "Python"

42. translate() – Replace characters using mapping

"hello".translate(str.maketrans("h","H"))  # Output: "Hello"

43. maketrans() – Create translation mapping

str.maketrans("abc", "123")  # Mapping {'a':'1','b':'2','c':'3'}

44. casefold() – Aggressive lowercasing for comparisons

"HELLO".casefold()  # Output: "hello"

45. removeprefix() – Remove prefix string

"TestString".removeprefix("Test")  # Output: "String"

46. removesuffix() – Remove suffix string

"TestString".removesuffix("String")  # Output: "Test"

47. isascii() – Check if all chars are ASCII

"Python".isascii()  # Output: True

48. partition() – Split string into three parts

"Hello World".partition(" ")  # Output: ('Hello',' ','World')

49. rpartition() – Split string from right

"Hello World".rpartition(" ")  # Output: ('Hello',' ','World')

50. removeprefix() – Remove specific prefix

"PythonLearn".removeprefix("Python")  # Output: "Learn"

51. removesuffix() – Remove specific suffix

"PythonLearn".removesuffix("Learn")  # Output: "Python"

52. expandtabs() – Convert tab to spaces

"Hello\tWorld".expandtabs(4)  # Output: "Hello   World"

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💡 Tips:

• Use strip(), lstrip(), rstrip() to clean input.

• Combine split() & join() for powerful text processing.

• Use format() or f-strings for dynamic strings.

• Use translate() and maketrans() for bulk character replacements.