The smtpd module includes classes for building simple mail transport protocol servers. It is the server-side of the protocol used by smtplib .
This post is part of the Python Module of the Week series for Python 3. See PyMOTW.com for more articles from the series.
The statistics module implements many common statistical formulas for efficient calculations using Python’s various numerical types ( int , float , Decimal , and Fraction ).
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The socket module exposes the low-level C API for communicating over a network using the BSD socket interface. It includes the socket class, for handling the actual data channel, and also includes functions for network-related tasks such as converting a server’s name to an address and formatting data to be sent across the network.
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The sqlite3 module provides a DB-API 2.0 compliant interface to SQLite, an in-process relational database. SQLite is designed to be embedded in applications, instead of using a separate database server program such as MySQL, PostgreSQL, or Oracle. It is fast, rigorously tested, and flexible, making it suitable for prototyping and production deployment for some applications.
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The HMAC algorithm can be used to verify the integrity of information passed between applications or stored in a potentially vulnerable location. The basic idea is to generate a cryptographic hash of the actual data combined with a shared secret key. The resulting hash can then be used to check the transmitted or stored message to determine a level of trust, without transmitting the secret key.
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imapautofiler applies user-defined rules to automatically organize messages on an IMAP server.
The math module implements many of the IEEE functions that would normally be found in the native platform C libraries for complex mathematical operations using floating point values, including logarithms and trigonometric operations.
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The tarfile module provides read and write access to UNIX tar archives, including compressed files. In addition to the POSIX standards, several GNU tar extensions are supported. UNIX special file types such as hard and soft links, and device nodes are also handled.
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The inspect module provides functions for learning about live objects, including modules, classes, instances, functions, and methods. The functions in this module can be used to retrieve the original source code for a function, look at the arguments to a method on the stack, and extract the sort of information useful for producing library documentation for source code.
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The decimal module implements fixed and floating point arithmetic using the model familiar to most people, rather than the IEEE floating point version implemented by most computer hardware and familiar to programmers. A Decimal instance can represent any number exactly, round up or down, and apply a limit to the number of significant digits.
This post is part of the Python Module of the Week series for Python 3. See PyMOTW.com for more articles from the series.