XlsxWriter is a Python module that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file.

pyfavicon is an async favicon fetcher.

If your code lets other people supply callback functions, it's important to specify the function signature you expect, and check that functions support that. Adding extra parameters later would break other peoples code unless you're careful. The backcall package provides a way of specifying the callback signature using a prototype function.

Cloudpickle makes it possible to serialize Python constructs not supported by the default pickle module from the Python standard library. It is especially useful for cluster computing where Python expressions are shipped over the network to execute on remote hosts, possibly close to the data.

MonthDelta provides functionality to do date computations with months.

Daft is a Python package that uses matplotlib to render pixel-perfect probabilistic graphical models for publication in a journal or on the internet. With a short Python script and an intuitive model-building syntax you can design directed (Bayesian Networks, directed acyclic graphs) and undirected (Markov random fields) models and save them in any formats that matplotlib supports (including PDF, PNG, EPS and SVG).

This module provides various memoizing collections and decorators, including variants of the Python standard library's lru_cache function decorator.

Pure Python multicast DNS (mDNS) service discovery library (Bonjour/Avahi compatible).

Scapy is a Python library and executable for interactively manipulating network packets. It can forge or decode packets of a number of protocols, send them on the wire, capture them, store or read them using pcap files, match requests and replies, and so on. It can handle tasks such as scanning, tracerouting, probing, unit tests, attacks or network discovery.

Boltons is a set of over 230 pure-Python utilities in the same spirit as — and yet conspicuously missing from — the standard library, including:

• Atomic file saving, bolted on with fileutils

• A highly-optimized OrderedMultiDict, in dictutils

• Two types of PriorityQueue, in queueutils

• Chunked and windowed iteration, in iterutils

• Recursive data structure iteration and merging, with iterutils.remap

• Exponential backoff functionality, including jitter, through iterutils.backoff

• A full-featured TracebackInfo type, for representing stack traces, in tbutils

Pybtex is a BibTeX-compatible bibliography processor written in Python. You can simply type pybtex instead of bibtex.

This package provides a tool for modifying a user's PATH.

The extension-helpers package includes convenience helpers to assist with building Python packages with compiled C/Cython extensions. It is developed by the Astropy project but is intended to be general and usable by any Python package.

This project provides a typed parser. It was started as part of Pint, the Python units package.

Gamera is a toolkit for building document image recognition systems.

This package provides a decorator that raises an error when an operation takes longer than expected.

This package lets you parse Python docstrings in reST, Google and Numpydoc format.

This package is a small C++ header library which makes it easier to write Python extension modules. The primary feature is a PyObject smart pointer which automatically handles reference counting and provides convenience methods for performing common object operations.

python-future is the missing compatibility layer between Python 2 and Python 3. It allows you to use a single, clean Python 3.x-compatible codebase to support both Python 2 and Python 3 with minimal overhead.

This package provides functions to compute fnctl.ioctl's opt argument.

This package provides a decorator for adding multiple argument dispatching to functions. The decorator creates a multimethod object as needed and registers the function with its annotations.

This package provides a drop-in replacement for the original LooseVersion. It implements an identical interface and comparison logic to LooseVersion. The only major change is that a looseversion.LooseVersion is comparable to a distutils.version.LooseVersion, which means tools should not need to worry whether all dependencies that use LooseVersion have migrated.

This package provides a collection of library stubs for Python, with static types.

ConfigObj is a simple but powerful config file reader and writer: an ini file round tripper. Its main feature is that it is very easy to use, with a straightforward programmer’s interface and a simple syntax for config files.