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PyLabs|Learn Python by writing it.

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Standard Library & Built-ins

Python Reference Library

171 entries with plain-English explanations, signatures and runnable examples.

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Built-in Functions

Functions Python gives you everywhere — no import needed.

List Methods

Common ways to add, find, remove, and arrange items in a list.

Dictionary Methods

Useful ways to look up, add, remove, and inspect dictionary data.

String Methods

Practical tools for finding, changing, checking, and splitting Python text.

Set Methods

Ways to manage unique values and compare groups of values.

Tuple Methods

The two built-in ways to search and count values in an immutable tuple.

File Methods

Ways to read, write, move through, and manage open files.

A–Z index

Every entry, grouped by the first character of its name.

A B C D E F G H I J K L M N O P R S T U V W Z

A

abs()Built-in Functions add()Set Methods all()Built-in Functions any()Built-in Functions append()List Methods ascii()Built-in Functions

B

bin()Built-in Functions bool()Built-in Functions bytearray()Built-in Functions bytes()Built-in Functions

C

callable()Built-in Functions capitalize()String Methods casefold()String Methods center()String Methods chr()Built-in Functions classmethod()Built-in Functions clear()List Methods clear()Dictionary Methods clear()Set Methods close()File Methods compile()Built-in Functions complex()Built-in Functions copy()List Methods copy()Dictionary Methods copy()Set Methods count()List Methods count()String Methods count()Tuple Methods

D

delattr()Built-in Functions detach()File Methods dict()Built-in Functions difference_update()Set Methods difference()Set Methods dir()Built-in Functions discard()Set Methods divmod()Built-in Functions

E

encode()String Methods endswith()String Methods enumerate()Built-in Functions eval()Built-in Functions exec()Built-in Functions expandtabs()String Methods extend()List Methods

F

fileno()File Methods filter()Built-in Functions find()String Methods float()Built-in Functions flush()File Methods format_map()String Methods format()Built-in Functions format()String Methods fromkeys()Dictionary Methods frozenset()Built-in Functions

G

get()Dictionary Methods getattr()Built-in Functions globals()Built-in Functions

H

hasattr()Built-in Functions hash()Built-in Functions help()Built-in Functions hex()Built-in Functions

I

id()Built-in Functions index()List Methods index()String Methods index()Tuple Methods input()Built-in Functions insert()List Methods int()Built-in Functions intersection_update()Set Methods intersection()Set Methods isalnum()String Methods isalpha()String Methods isascii()String Methods isatty()File Methods isdecimal()String Methods isdigit()String Methods isdisjoint()Set Methods isidentifier()String Methods isinstance()Built-in Functions islower()String Methods isnumeric()String Methods isprintable()String Methods isspace()String Methods issubclass()Built-in Functions issubset()Set Methods issuperset()Set Methods istitle()String Methods isupper()String Methods items()Dictionary Methods iter()Built-in Functions

J

join()String Methods

K

keys()Dictionary Methods

L

len()Built-in Functions list()Built-in Functions ljust()String Methods locals()Built-in Functions lower()String Methods lstrip()String Methods

M

maketrans()String Methods map()Built-in Functions max()Built-in Functions memoryview()Built-in Functions min()Built-in Functions

N

next()Built-in Functions

O

object()Built-in Functions oct()Built-in Functions open()Built-in Functions ord()Built-in Functions

P

partition()String Methods pop()List Methods pop()Dictionary Methods pop()Set Methods popitem()Dictionary Methods pow()Built-in Functions print()Built-in Functions property()Built-in Functions

R

range()Built-in Functions read()File Methods readable()File Methods readline()File Methods readlines()File Methods remove()List Methods remove()Set Methods removeprefix()String Methods removesuffix()String Methods replace()String Methods repr()Built-in Functions reverse()List Methods reversed()Built-in Functions rfind()String Methods rindex()String Methods rjust()String Methods round()Built-in Functions rpartition()String Methods rsplit()String Methods rstrip()String Methods

S

seek()File Methods seekable()File Methods set()Built-in Functions setattr()Built-in Functions setdefault()Dictionary Methods slice()Built-in Functions sort()List Methods sorted()Built-in Functions split()String Methods splitlines()String Methods startswith()String Methods staticmethod()Built-in Functions str()Built-in Functions strip()String Methods sum()Built-in Functions super()Built-in Functions swapcase()String Methods symmetric_difference_update()Set Methods symmetric_difference()Set Methods

T

tell()File Methods title()String Methods translate()String Methods truncate()File Methods tuple()Built-in Functions type()Built-in Functions

U

union()Set Methods update()Dictionary Methods update()Set Methods upper()String Methods

V

values()Dictionary Methods vars()Built-in Functions

W

writable()File Methods write()File Methods writelines()File Methods

Z

zfill()String Methods zip()Built-in Functions