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Python Standard Library Reference

Complete interactive reference for Python's standard library. Browse 124+ functions across 21 categories with live, runnable examples.

124+
Functions
21
Categories
100%
Standard Library
⚡
Built-in Functions
9 functions
print() len() type() isinstance() range() enumerate() zip() map() filter()
🔄
Type Conversion
6 functions
int() float() str() bool() list() dict()
Aa
String Methods
15+ methods
split() join() strip() replace() find() upper() lower() format() startswith() endswith()
[]
List Methods
11 methods
append() extend() insert() remove() pop() index() count() sort() reverse() copy() clear()
{}
Dictionary Methods
10 methods
keys() values() items() get() update() pop() setdefault() clear() copy() fromkeys()
∪
Set Methods
8 methods
add() remove() discard() union() intersection() difference() update() clear()
🔐
Hashing & Secrets
7 functions
md5() sha1() sha256() sha512() token_hex() token_urlsafe() token_bytes()
🌐
Networking
7 functions
urlencode() urlparse() quote() unquote() urlopen() gethostname() gethostbyname()
📦
Collections
3 classes
Counter() defaultdict() deque()
🔄
Itertools
4 functions
chain() combinations() permutations() groupby()
.*
Regular Expressions
5 functions
match() search() findall() sub() split()
∑
Math Functions
12 functions
abs() round() min() max() sum() pow() divmod() sqrt() ceil() floor() factorial() pi
🕐
Date & Time
6 functions
now() date() strftime() strptime() time() sleep()
📁
File & OS
13 functions
open() read() write() close() exists() getcwd() listdir() mkdir() remove()
📝
JSON & Encoding
4 functions
loads() dumps() b64encode() b64decode()
🎲
Random
4 functions
random() randint() choice() shuffle()

✨ What's Included

🎯 Core Python

Built-in functions, type conversion, and essential operations

📊 Data Structures

Strings, lists, dicts, sets, tuples, collections

🔐 Cryptography

Hashing (MD5, SHA), secrets, Base64 encoding

🌐 Networking

URL parsing, HTTP requests, DNS lookups

⚡ Advanced

Collections, itertools, regex, file I/O

🎲 Utilities

Math, random, date/time, JSON, OS operations