Sifr Standard Library Module Index

Sifr standard-library modules live under the sifr.* namespace. Import concrete symbols from the module you need:

from sifr.json import loads
from sifr.pathlib import join_path

This page is an orientation map. The deeper reference pages cover the modules most developers reach for first, and the compiler rejects bare CPython imports with SIFR-IMPORT-0008.

For the exact symbol inventory, see the compiled public API.

Choosing a Module

Collections

Lists, dictionaries, sets, counters, and safe lookup patterns.

I/O and Filesystem

Text/binary boundaries, paths, files, and directories.

Networking

TCP, HTTP, TLS, URLs, and typed network errors.

Text and Encoding

Strings, encoding boundaries, Unicode, and i18n helpers.

Math, Data, and Serialization

Module	Purpose
`sifr.math`	Mathematical functions and numeric helpers.
`sifr.json`	Typed JSON values, parsing, and serialization.
`sifr.re`	Unicode-aware regular expression matching and substitution.
`sifr.datetime`	Dates, times, durations, and timezone-aware values.
`sifr.random`	Seeded random number generation.
`sifr.statistics`	Mean, median, variance, and related statistics.
`sifr.hashlib`	Bytes-native MD5, SHA-1, SHA-2, and BLAKE2 digest objects.
`sifr.uuid`	UUID construction, parsing, and formatting.
`sifr.base64`	Base64 text and byte encoding helpers.
`sifr.tomllib`	TOML value parsing helpers.
`sifr.csv`	CSV dialects, readers, and writers.
`sifr.configparser`	INI-style configuration parsing.

Collections and Iteration

Module	Purpose
`sifr.collections`	Counters, deques, and immutable `frozenset` values.
`sifr.itertools`	Iterator construction and combinator helpers.
`sifr.functools`	Higher-order function helpers such as `reduce`.
`sifr.operator`	Named operator functions.
`sifr.bisect`	Binary search and insertion helpers for ordered lists.
`sifr.heapq`	Heap queues and priority queue helpers.
`sifr.graphlib`	Topological sorting helpers.

Filesystem, Environment, and System

Module	Purpose
`sifr.io`	Explicit text and binary file I/O.
`sifr.pathlib`	Path construction, joining, and traversal helpers.
`sifr.os`	Filesystem stat helpers.
`sifr.shutil`	Copy, move, and recursive remove helpers.
`sifr.glob`	Filesystem glob expansion.
`sifr.fnmatch`	Shell-style filename pattern matching.
`sifr.tempfile`	Temporary file and directory helpers.
`sifr.env`	Process environment variable access.
`sifr.sys`	Process arguments, exit, version, and platform constants.
`sifr.platform`	Host platform metadata.

Text, Encoding, and Internationalization

Module	Purpose
`sifr.string`	String templating and formatting helpers.
`sifr.textwrap`	Text wrapping, indentation, and whitespace helpers.
`sifr.encoding`	Explicit byte/text conversion with typed encoding errors.
`sifr.unicode`	Unicode data, normalization, names, categories, and segmentation.
`sifr.i18n`	Locale ids, number formatting, plural rules, and translation catalogs.
`sifr.html`	HTML escaping and unescaping.

Byte construction, search, hexadecimal formatting, and UTF-8 conversion are first-class bytes operations. They do not require a stdlib import.

Concurrency and Runtime

Concurrency concepts and the full API live in the Concurrency section. The modules below are the inventory map:

Module	Purpose
`sifr.task`	Task contexts and structured task helpers.
`sifr.sync`	Channels, shared values, locks, semaphores, and notifications.
`sifr.parallel`	CPU-parallel maps and worker pools.
`sifr.process`	Subprocess spawning, output collection, pipes, and async process helpers.
`sifr.signal`	Structured signal and shutdown helpers.
`sifr.runtime`	Structured runtime diagnostic events.
`sifr.resource`	Deterministic cleanup context helpers.
`sifr.ipc`	Typed IPC schema, frame, and backpressure primitives.
`sifr.time`	Wall-clock and calendar time helpers.
`sifr.timeit`	Timing helpers and repeatable benchmark loops.
`sifr.logging`	Structured log levels, formatters, handlers, and emitters.

Networking and Archives

Module	Purpose
`sifr.net`	Async TCP networking primitives.
`sifr.http`	HTTP methods, status codes, headers, bodies, and cookies.
`sifr.tls`	TLS client/server configuration and streams.
`sifr.url`	Typed URL parsing and manipulation.
`sifr.ipaddress`	IPv4 parsing, classification, and conversion.
`sifr.gzip`	Gzip compression and decompression.
`sifr.zipfile`	ZIP archive inspection and read helpers.
`sifr.secrets`	Security-oriented random helpers and constant-time comparison.

Testing and CLIs

Module	Purpose
`sifr.test`	Assertion helpers for Sifr tests.
`sifr.argparse`	Command-line option parsing helpers and typed namespaces.

Additional Modules

Module	Purpose
`sifr.calendar`	Calendar date calculations and text calendar helpers.
`sifr.difflib`	Sequence matching and diff-adjacent helpers.

Get Started

Learn Sifr

CLI

Package Management

Standard Library

Concurrency

Error Codes

Sifr Standard Library Module Index

Choosing a Module

Collections

I/O and Filesystem

Networking

Text and Encoding

Math, Data, and Serialization

Collections and Iteration

Filesystem, Environment, and System

Text, Encoding, and Internationalization

Concurrency and Runtime

Networking and Archives

Testing and CLIs

Additional Modules

​Choosing a Module

Collections

I/O and Filesystem

Networking

Text and Encoding

​Math, Data, and Serialization

​Collections and Iteration

​Filesystem, Environment, and System

​Text, Encoding, and Internationalization

​Concurrency and Runtime

​Networking and Archives

​Testing and CLIs

​Additional Modules

Choosing a Module

Math, Data, and Serialization

Collections and Iteration

Filesystem, Environment, and System

Text, Encoding, and Internationalization

Concurrency and Runtime

Networking and Archives

Testing and CLIs

Additional Modules