1. Introduction
2. Built-in Functions
3. Built-in Constants
- 3.1. Constants added by the site module
4. Built-in Types
- 4.1. Truth Value Testing
- 4.2. Boolean Operations — and, or, not
- 4.3. Comparisons
- 4.4. Numeric Types — int, float, complex
- 4.5. Iterator Types
- 4.6. Sequence Types — list, tuple, range
- 4.7. Text Sequence Type — str
- 4.8. Binary Sequence Types — bytes, bytearray, memoryview
- 4.9. Set Types — set, frozenset
- 4.10. Mapping Types — dict
- 4.11. Context Manager Types
- 4.12. Other Built-in Types
- 4.13. Special Attributes
5. Built-in Exceptions
- 5.1. Base classes
- 5.2. Concrete exceptions
- 5.3. Warnings
- 5.4. Exception hierarchy
6. Text Processing Services
- 6.1. string — Common string operations
- 6.2. re — Regular expression operations
- 6.3. difflib — Helpers for computing deltas
- 6.4. textwrap — Text wrapping and filling
- 6.5. unicodedata — Unicode Database
- 6.6. stringprep — Internet String Preparation
- 6.7. readline — GNU readline interface
- 6.8. rlcompleter — Completion function for GNU readline
7. Binary Data Services
- 7.1. struct — Interpret bytes as packed binary data
- 7.2. codecs — Codec registry and base classes
8. Data Types
- 8.1. datetime — Basic date and time types
- 8.2. calendar — General calendar-related functions
- 8.3. collections — Container datatypes
- 8.4. collections.abc — Abstract Base Classes for Containers
- 8.5. heapq — Heap queue algorithm
- 8.6. bisect — Array bisection algorithm
- 8.7. array — Efficient arrays of numeric values
- 8.8. weakref — Weak references
- 8.9. types — Dynamic type creation and names for built-in types
- 8.10. copy — Shallow and deep copy operations
- 8.11. pprint — Data pretty printer
- 8.12. reprlib — Alternate repr() implementation
- 8.13. enum — Support for enumerations
9. Numeric and Mathematical Modules
- 9.1. numbers — Numeric abstract base classes
- 9.2. math — Mathematical functions
- 9.3. cmath — Mathematical functions for complex numbers
- 9.4. decimal — Decimal fixed point and floating point arithmetic
- 9.5. fractions — Rational numbers
- 9.6. random — Generate pseudo-random numbers
- 9.7. statistics — Mathematical statistics functions
10. Functional Programming Modules
- 10.1. itertools — Functions creating iterators for efficient looping
- 10.2. functools — Higher-order functions and operations on callable objects
- 10.3. operator — Standard operators as functions
11. File and Directory Access
- 11.1. pathlib — Object-oriented filesystem paths
- 11.2. os.path — Common pathname manipulations
- 11.3. fileinput — Iterate over lines from multiple input streams
- 11.4. stat — Interpreting stat() results
- 11.5. filecmp — File and Directory Comparisons
- 11.6. tempfile — Generate temporary files and directories
- 11.7. glob — Unix style pathname pattern expansion
- 11.8. fnmatch — Unix filename pattern matching
- 11.9. linecache — Random access to text lines
- 11.10. shutil — High-level file operations
- 11.11. macpath — Mac OS 9 path manipulation functions
12. Data Persistence
- 12.1. pickle — Python object serialization
- 12.2. copyreg — Register pickle support functions
- 12.3. shelve — Python object persistence
- 12.4. marshal — Internal Python object serialization
- 12.5. dbm — Interfaces to Unix “databases”
- 12.6. sqlite3 — DB-API 2.0 interface for SQLite databases
13. Data Compression and Archiving
- 13.1. zlib — Compression compatible with gzip
- 13.2. gzip — Support for gzip files
- 13.3. bz2 — Support for bzip2 compression
- 13.4. lzma — Compression using the LZMA algorithm
- 13.5. zipfile — Work with ZIP archives
- 13.6. tarfile — Read and write tar archive files
14. File Formats
- 14.1. csv — CSV File Reading and Writing
- 14.2. configparser — Configuration file parser
- 14.3. netrc — netrc file processing
- 14.4. xdrlib — Encode and decode XDR data
- 14.5. plistlib — Generate and parse Mac OS X .plist files
15. Cryptographic Services
- 15.1. hashlib — Secure hashes and message digests
- 15.2. hmac — Keyed-Hashing for Message Authentication
16. Generic Operating System Services
- 16.1. os — Miscellaneous operating system interfaces
- 16.2. io — Core tools for working with streams
- 16.3. time — Time access and conversions
- 16.4. argparse — Parser for command-line options, arguments and sub-commands
- 16.5. getopt — C-style parser for command line options
- 16.6. logging — Logging facility for Python
- 16.7. logging.config — Logging configuration
- 16.8. logging.handlers — Logging handlers
- 16.9. getpass — Portable password input
- 16.10. curses — Terminal handling for character-cell displays
- 16.11. curses.textpad — Text input widget for curses programs
- 16.12. curses.ascii — Utilities for ASCII characters
- 16.13. curses.panel — A panel stack extension for curses
- 16.14. platform — Access to underlying platform’s identifying data
- 16.15. errno — Standard errno system symbols
- 16.16. ctypes — A foreign function library for Python
17. Concurrent Execution
- 17.1. threading — Thread-based parallelism
- 17.2. multiprocessing — Process-based parallelism
- 17.3. The concurrent package
- 17.4. concurrent.futures — Launching parallel tasks
- 17.5. subprocess — Subprocess management
- 17.6. sched — Event scheduler
- 17.7. queue — A synchronized queue class
- 17.8. dummy_threading — Drop-in replacement for the threading module
- 17.9. _thread — Low-level threading API
- 17.10. _dummy_thread — Drop-in replacement for the _thread module
18. Interprocess Communication and Networking
- 18.1. socket — Low-level networking interface
- 18.2. ssl — TLS/SSL wrapper for socket objects
- 18.3. select — Waiting for I/O completion
- 18.4. selectors – High-level I/O multiplexing
- 18.5. asyncio – Asynchronous I/O, event loop, coroutines and tasks
- 18.6. asyncore — Asynchronous socket handler
- 18.7. asynchat — Asynchronous socket command/response handler
- 18.8. signal — Set handlers for asynchronous events
- 18.9. mmap — Memory-mapped file support
19. Internet Data Handling
- 19.1. email — An email and MIME handling package
- 19.2. json — JSON encoder and decoder
- 19.3. mailcap — Mailcap file handling
- 19.4. mailbox — Manipulate mailboxes in various formats
- 19.5. mimetypes — Map filenames to MIME types
- 19.6. base64 — Base16, Base32, Base64, Base85 Data Encodings
- 19.7. binhex — Encode and decode binhex4 files
- 19.8. binascii — Convert between binary and ASCII
- 19.9. quopri — Encode and decode MIME quoted-printable data
- 19.10. uu — Encode and decode uuencode files
20. Structured Markup Processing Tools
- 20.1. html — HyperText Markup Language support
- 20.2. html.parser — Simple HTML and XHTML parser
- 20.3. html.entities — Definitions of HTML general entities
- 20.4. XML Processing Modules
- 20.5. xml.etree.ElementTree — The ElementTree XML API
- 20.6. xml.dom — The Document Object Model API
- 20.7. xml.dom.minidom — Minimal DOM implementation
- 20.8. xml.dom.pulldom — Support for building partial DOM trees
- 20.9. xml.sax — Support for SAX2 parsers
- 20.10. xml.sax.handler — Base classes for SAX handlers
- 20.11. xml.sax.saxutils — SAX Utilities
- 20.12. xml.sax.xmlreader — Interface for XML parsers
- 20.13. xml.parsers.expat — Fast XML parsing using Expat
21. Internet Protocols and Support
- 21.1. webbrowser — Convenient Web-browser controller
- 21.2. cgi — Common Gateway Interface support
- 21.3. cgitb — Traceback manager for CGI scripts
- 21.4. wsgiref — WSGI Utilities and Reference Implementation
- 21.5. urllib — URL handling modules
- 21.6. urllib.request — Extensible library for opening URLs
- 21.7. urllib.response — Response classes used by urllib
- 21.8. urllib.parse — Parse URLs into components
- 21.9. urllib.error — Exception classes raised by urllib.request
- 21.10. urllib.robotparser — Parser for robots.txt
- 21.11. http — HTTP modules
- 21.12. http.client — HTTP protocol client
- 21.13. ftplib — FTP protocol client
- 21.14. poplib — POP3 protocol client
- 21.15. imaplib — IMAP4 protocol client
- 21.16. nntplib — NNTP protocol client
- 21.17. smtplib — SMTP protocol client
- 21.18. smtpd — SMTP Server
- 21.19. telnetlib — Telnet client
- 21.20. uuid — UUID objects according to RFC 4122
- 21.21. socketserver — A framework for network servers
- 21.22. http.server — HTTP servers
- 21.23. http.cookies — HTTP state management
- 21.24. http.cookiejar — Cookie handling for HTTP clients
- 21.25. xmlrpc — XMLRPC server and client modules
- 21.26. xmlrpc.client — XML-RPC client access
- 21.27. xmlrpc.server — Basic XML-RPC servers
- 21.28. ipaddress — IPv4/IPv6 manipulation library
22. Multimedia Services
- 22.1. audioop — Manipulate raw audio data
- 22.2. aifc — Read and write AIFF and AIFC files
- 22.3. sunau — Read and write Sun AU files
- 22.4. wave — Read and write WAV files
- 22.5. chunk — Read IFF chunked data
- 22.6. colorsys — Conversions between color systems
- 22.7. imghdr — Determine the type of an image
- 22.8. sndhdr — Determine type of sound file
- 22.9. ossaudiodev — Access to OSS-compatible audio devices
23. Internationalization
- 23.1. gettext — Multilingual internationalization services
- 23.2. locale — Internationalization services
24. Program Frameworks
- 24.1. turtle — Turtle graphics
- 24.2. cmd — Support for line-oriented command interpreters
- 24.3. shlex — Simple lexical analysis
25. Graphical User Interfaces with Tk
- 25.1. tkinter — Python interface to Tcl/Tk
- 25.2. tkinter.ttk — Tk themed widgets
- 25.3. tkinter.tix — Extension widgets for Tk
- 25.4. tkinter.scrolledtext — Scrolled Text Widget
- 25.5. IDLE
- 25.6. Other Graphical User Interface Packages
26. Development Tools
- 26.1. typing — Support for type hints
- 26.2. pydoc — Documentation generator and online help system
- 26.3. doctest — Test interactive Python examples
- 26.4. unittest — Unit testing framework
- 26.5. unittest.mock — mock object library
- 26.6. unittest.mock — getting started
- 26.7. 2to3 - Automated Python 2 to 3 code translation
- 26.8. test — Regression tests package for Python
- 26.9. test.support — Utilities for the Python test suite
27. Debugging and Profiling
- 27.1. bdb — Debugger framework
- 27.2. faulthandler — Dump the Python traceback
- 27.3. pdb — The Python Debugger
- 27.4. The Python Profilers
- 27.5. timeit — Measure execution time of small code snippets
- 27.6. trace — Trace or track Python statement execution
- 27.7. tracemalloc — Trace memory allocations
28. Software Packaging and Distribution
- 28.1. distutils — Building and installing Python modules
- 28.2. ensurepip — Bootstrapping the pip installer
- 28.3. venv — Creation of virtual environments
- 28.4. zipapp — Manage executable python zip archives
29. Python Runtime Services
- 29.1. sys — System-specific parameters and functions
- 29.2. sysconfig — Provide access to Python’s configuration information
- 29.3. builtins — Built-in objects
- 29.4. __main__ — Top-level script environment
- 29.5. warnings — Warning control
- 29.6. contextlib — Utilities for with-statement contexts
- 29.7. abc — Abstract Base Classes
- 29.8. atexit — Exit handlers
- 29.9. traceback — Print or retrieve a stack traceback
- 29.10. __future__ — Future statement definitions
- 29.11. gc — Garbage Collector interface
- 29.12. inspect — Inspect live objects
- 29.13. site — Site-specific configuration hook
- 29.14. fpectl — Floating point exception control
30. Custom Python Interpreters
- 30.1. code — Interpreter base classes
- 30.2. codeop — Compile Python code
31. Importing Modules
- 31.1. zipimport — Import modules from Zip archives
- 31.2. pkgutil — Package extension utility
- 31.3. modulefinder — Find modules used by a script
- 31.4. runpy — Locating and executing Python modules
- 31.5. importlib – The implementation of import
32. Python Language Services
- 32.1. parser — Access Python parse trees
- 32.2. ast — Abstract Syntax Trees
- 32.3. symtable — Access to the compiler’s symbol tables
- 32.4. symbol — Constants used with Python parse trees
- 32.5. token — Constants used with Python parse trees
- 32.6. keyword — Testing for Python keywords
- 32.7. tokenize — Tokenizer for Python source
- 32.8. tabnanny — Detection of ambiguous indentation
- 32.9. pyclbr — Python class browser support
- 32.10. py_compile — Compile Python source files
- 32.11. compileall — Byte-compile Python libraries
- 32.12. dis — Disassembler for Python bytecode
- 32.13. pickletools — Tools for pickle developers
33. Miscellaneous Services
- 33.1. formatter — Generic output formatting
34. MS Windows Specific Services
- 34.1. msilib — Read and write Microsoft Installer files
- 34.2. msvcrt – Useful routines from the MS VC++ runtime
- 34.3. winreg – Windows registry access
- 34.4. winsound — Sound-playing interface for Windows
35. Unix Specific Services
- 35.1. posix — The most common POSIX system calls
- 35.2. pwd — The password database
- 35.3. spwd — The shadow password database
- 35.4. grp — The group database
- 35.5. crypt — Function to check Unix passwords
- 35.6. termios — POSIX style tty control
- 35.7. tty — Terminal control functions
- 35.8. pty — Pseudo-terminal utilities
- 35.9. fcntl — The fcntl and ioctl system calls
- 35.10. pipes — Interface to shell pipelines
- 35.11. resource — Resource usage information
- 35.12. nis — Interface to Sun’s NIS (Yellow Pages)
- 35.13. syslog — Unix syslog library routines
36. Superseded Modules
- 36.1. optparse — Parser for command line options
- 36.2. imp — Access the import internals
37. Undocumented Modules
- 37.1. Platform specific modules