Source code: Lib/argparse.py Tutorial: This page contains the API reference information. For a more gentle introduction to Python command-line parsing, have a look at the argparse tutorial. The arg...

Source code: Lib/doctest.py The doctest module searches for pieces of text that look like interactive Python sessions, and then executes those sessions to verify that they work exactly as shown. Th...

Source code: Lib/calendar.py This module allows you to output calendars like the Unix cal program, and provides additional useful functions related to the calendar. By default, these calendars have...

Source code: Lib/difflib.py This module provides classes and functions for comparing sequences. It can be used for example, for comparing files, and can produce information about file differences i...

A Scala Tutorial for Java Programmers Language If you are coming to Scala with some Java experience already, this pag...

Source code: Lib/ipaddress.py ipaddress provides the capabilities to create, manipulate and operate on IPv4 and IPv6 addresses and networks. The functions and classes in this module make it straigh...

The xml.parsers.expat module is a Python interface to the Expat non-validating XML parser. The module provides a single extension type, xmlparser, that represents the current state of an XML parser...

Source code: Lib/email/message.py The central class in the email package is the EmailMessage class, imported from the email.message module. It is the base class for the email object model. EmailMes...

Tour of Scala 自类型 Language 自类型用于声明一个特质必须混入其他特质，尽管该特质没有直接扩展其他特质。 这使得所依赖的成员可以在没有导入的情况下使用。 自类型是一种细化 this 或 this 别名之类型的方法...

Tour of Scala 类型推断 Language Scala 编译器通常可以推断出表达式的类型，因此你不必显式地声明它。 省略类型 val businessName = "Montreux Jazz Café" 编译器可以发现 ...