100 Most common python codes

 Below are 100 Python functions along with their uses and simple examples:

1. print(): Displays text or variables. Example: print("Hello, World!")
2. input(): Accepts user input. Example: name = input("Enter your name: ")
3. len(): Returns the length of a string or list. Example: length = len("Python")
4. type(): Returns the data type of a variable. Example: data_type = type(42)
5. int(): Converts a value to an integer. Example: number = int("5")
6. float(): Converts a value to a floating-point number. Example: decimal = float("3.14")
7. str(): Converts a value to a string. Example: text = str(42)
8. list(): Converts a sequence to a list. Example: my_list = list("Python")
9. tuple(): Converts a sequence to a tuple. Example: my_tuple = tuple("Python")
10. set(): Converts a sequence to a set. Example: my_set = set("Python")
11. dict(): Creates a dictionary. Example: my_dict = dict(key1="value1", key2="value2")
12. range(): Generates a sequence of numbers. Example: numbers = range(1, 6)
13. zip(): Combines two or more sequences. Example: zipped = zip(["a", "b"], [1, 2])
14. sum(): Adds up the elements of a sequence. Example: total = sum([1, 2, 3])
15. min(): Returns the smallest element in a sequence. Example: minimum = min([4, 2, 7])
16. max(): Returns the largest element in a sequence. Example: maximum = max([4, 2, 7])
17. abs(): Returns the absolute value of a number. Example: absolute_value = abs(-5)
18. round(): Rounds a number to a specified number of decimal places. Example: rounded = round(3.14159, 2)
19. sorted(): Returns a sorted list from a sequence. Example: sorted_list = sorted([3, 1, 4])
20. reversed(): Returns a reversed version of a sequence. Example: reversed_list = list(reversed([1, 2, 3]))
21. any(): Returns True if at least one element in a sequence is true. Example: result = any([True, False, False])
22. all(): Returns True if all elements in a sequence are true. Example: result = all([True, True, True])
23. filter(): Filters elements in a sequence based on a function. Example: filtered = filter(lambda x: x > 0, [-1, 2, -3])
24. map(): Applies a function to all elements in a sequence. Example: squared = map(lambda x: x**2, [1, 2, 3])
25. enumerate(): Returns index and value pairs from a sequence. Example: pairs = list(enumerate(["a", "b", "c"]))
26. bool(): Converts a value to a boolean. Example: is_true = bool("Hello")
27. abs(): Returns the absolute value of a number. Example: absolute_value = abs(-5)
28. pow(): Raises a number to a specified power. Example: result = pow(2, 3)
29. slice(): Extracts a portion of a sequence. Example: portion = slice(1, 4)
30. chr(): Returns a string representing a character with a given Unicode code. Example: character = chr(65)
31. ord(): Returns an integer representing the Unicode character. Example: code = ord("A")
32. format(): Formats a specified value. Example: formatted = format(3.14159, ".2f")
33. capitalize(): Converts the first character of a string to uppercase. Example: text = "hello".capitalize()
34. lower(): Converts a string to lowercase. Example: text = "HELLO".lower()
35. upper(): Converts a string to uppercase. Example: text = "hello".upper()
36. strip(): Removes leading and trailing whitespaces from a string. Example: text = " Hello ".strip()
37. replace(): Replaces occurrences of a substring in a string. Example: new_text = "hello".replace("e", "a")
38. count(): Returns the number of occurrences of a substring in a string. Example: count = "hello".count("l")
39. find(): Returns the index of the first occurrence of a substring in a string. Example: index = "hello".find("l")
40. startswith(): Checks if a string starts with a specified prefix. Example: result = "hello".startswith("he")
41. endswith(): Checks if a string ends with a specified suffix. Example: result = "hello".endswith("lo")
42. isdigit(): Checks if all characters in a string are digits. Example: result = "123".isdigit()
43. isalpha(): Checks if all characters in a string are alphabetic. Example: result = "abc".isalpha()
44. isalnum(): Checks if all characters in a string are alphanumeric. Example: result = "abc123".isalnum()
45. isspace(): Checks if all characters in a string are whitespaces. Example: result = " ".isspace()
46. isupper(): Checks if all characters in a string are uppercase. Example: result = "HELLO".isupper()
47. islower(): Checks if all characters in a string are lowercase. Example: result = "hello".islower()
48. join(): Joins elements of a sequence into a string. Example: `joined =

49. split(): Splits a string into a list of substrings based on a delimiter. Example: words = "Hello,World".split(",")
50. isnumeric(): Checks if all characters in a string are numeric. Example: result = "123".isnumeric()
51. isdecimal(): Checks if all characters in a string are decimals. Example: result = "123.45".isdecimal()
52. isidentifier(): Checks if a string is a valid identifier. Example: result = "variable_1".isidentifier()
53. title(): Converts the first character of each word to uppercase in a string. Example: text = "hello world".title()
54. isprintable(): Checks if all characters in a string are printable. Example: result = "Hello\nWorld".isprintable()
55. capitalize(): Converts the first character of a string to uppercase. Example: text = "hello".capitalize()
56. rjust(): Right-justifies a string in a field of a specified width. Example: justified = "hello".rjust(10)
57. ljust(): Left-justifies a string in a field of a specified width. Example: justified = "hello".ljust(10)
58. center(): Centers a string in a field of a specified width. Example: centered = "hello".center(10)
59. isdigit(): Checks if all characters in a string are digits. Example: result = "123".isdigit()
60. zfill(): Pads a numeric string with zeros on the left to a specified width. Example: padded = "42".zfill(5)
61. swapcase(): Swaps the case of each character in a string. Example: swapped = "Hello World".swapcase()
62. expandtabs(): Expands tab characters in a string to spaces. Example: expanded = "Tab\tExample".expandtabs(4)
63. isascii(): Checks if all characters in a string are ASCII. Example: result = "Hello".isascii()
64. hex(): Converts an integer to a hexadecimal string. Example: hex_string = hex(255)
65. oct(): Converts an integer to an octal string. Example: octal_string = oct(8)
66. bin(): Converts an integer to a binary string. Example: binary_string = bin(5)
67. eval(): Evaluates a string as a Python expression. Example: result = eval("2 + 3")
68. exec(): Executes a dynamically created Python program. Example: exec("print('Hello')")
69. round(): Rounds a number to a specified number of decimal places. Example: rounded = round(3.14159, 2)
70. dir(): Returns a list of names in the current scope or attributes of an object. Example: names = dir()
71. globals(): Returns a dictionary representing the current global symbol table. Example: global_vars = globals()
72. locals(): Returns a dictionary representing the current local symbol table. Example: local_vars = locals()
73. repr(): Returns a string representation of an object. Example: representation = repr([1, 2, 3])
74. hash(): Returns the hash value of an object. Example: hashed = hash("Hello")
75. callable(): Checks if an object appears callable. Example: result = callable(print)
76. id(): Returns the identity of an object. Example: identity = id([1, 2, 3])
77. chr(): Returns a string representing a character with a given Unicode code. Example: character = chr(65)
78. ord(): Returns an integer representing the Unicode character. Example: code = ord("A")
79. compile(): Compiles a source into a code or AST object. Example: compiled = compile("print('Hello')", '<string>', 'exec')
80. memoryview(): Returns a memory view object of an array. Example: view = memoryview(b'Hello')
81. ascii(): Returns a string containing a printable representation of an object. Example: representation = ascii('Hello')
82. bytearray(): Returns a mutable bytearray object. Example: arr = bytearray([65, 66, 67])
83. bytes(): Returns an immutable bytes object. Example: b = bytes([65, 66, 67])
84. filter(): Filters elements in a sequence based on a function. Example: filtered = filter(lambda x: x > 0, [-1, 2, -3])
85. map(): Applies a function to all elements in a sequence. Example: squared = map(lambda x: x**2, [1, 2, 3])
86. pow(): Raises a number to a specified power. Example: result = pow(2, 3)
87. sum(): Adds up the elements of a sequence. Example: total = sum([1, 2, 3])
88. enumerate(): Returns index and value pairs from a sequence. Example: pairs = list(enumerate(["a", "b", "c"]))
89. reversed(): Returns a reversed version of a sequence. Example: reversed_list = list(reversed([1, 2, 3]))
90. any(): Returns True if at least one element in a sequence is true. Example: result = any([True, False, False])
91. all(): Returns True if all elements in a sequence are true. Example: result = all([True, True, True])
92. hex(): Converts an integer to a hexadecimal string. Example: hex_string = hex(255)
93. oct(): Converts an integer to an octal string. Example: octal_string = oct(8)
94. bin(): Converts an integer to a binary string. Example: binary_string = bin(5)