python standard library pdf

view Python 's running process, such as a print-run stack, some of the hardware that provides interfaces to the operating system, such as access to the system, and others that are used in specific applications, such as the Internet; some modules can be used in Python all versions and porting, but some are supported only on some system; Python can only be used w

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Thank you Tolbkni kao help me correct the mistakeThe content here is based on the Linux Process Foundation and the Linux text stream. The main function of the subprocess package is to execute external commands and programs. For example, I need to use wget to download files. I called the wget program in Python. In this sense, the subprocess function i

The content here is based on the Linux Process Foundation and the Linux text stream. The main function of the subprocess package is to execute external commands and programs. For example, I need to use wget to download files. I called the wget program in Python. In this sense, the subprocess function is similar to the shell.Subprocess and common encapsulation functionsWhen we run Python, we are all creating

Python standard library: built-in function any (iterable), pythoniterable If one of all elements of an object that can be iterated is True, True is returned. Otherwise, False is returned. Or if the iteratable object is null, False is returned. This function is mainly used to determine whether the list, tuples, dictionaries, and other objects have elements that ar

participle206. Tabnany: Fuzzy indentation detection207. Pyclbr:python Class Browsing Support208. Py_compile: Compiling python source files209. Compileall: Compiling python libraries by byteThe disassembler of Dis:python byte code.211. Pickletools: Serialization Development toolsOther212. Formatter: Universal formatted outputWindows-related213. Msilib: Read and write Windows Installer files214. Msvcrt:ms VC

Os.path.exists () Verify that the given path is really present Os.linesep Gives the line terminator used by the current platform.For example, Windows uses ' \ r \ n ', Linux uses ' \ n ' and Mac uses ' \ R ' Os.name Indicates the platform you are using.For example, for Windows, it's ' NT ', and for Linux/unix users, it's ' POSIX '. SYS module sysThe module contains the functions that the system corresponds to.1. sys.argvCon

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Python implements multithreading primarily through the threading package in the standard library . In today's network era, each server receives a large number of requests. The server can handle these requests in a multi-threaded manner to improve the read and w

The Beautiful Soup Standard library is a Python library that extracts data from Html/xml files, allows you to navigate through your favorite converters, find and modify documents, and Beautiful soup will save hours of working time. The Pymongo standard

Just use, this article is well written, turn around to collect.Reprinted from Tao Road | usage details of the Python standard library urllib2There are many useful tool classes in the Python standard library, but it is not clear ho

Python standard library 14 database (SQLITE3)Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with

.------------------------------------------------------------------------------------------------------Using the Sys module to exit a program------------------------------------------------------------------------------------------------------Import SysSys.exit (1)Note Sys.exit does not exit immediately. Instead, a systemexit exception is thrown. This means that you can capture calls to Sys.exit in the main program----------------------------------------------------------------------------------

. There are modules that provide an interface to view The execution of Python. For example, a stack for printing execution. Some are provided with the operating system interface, such as access to the hardware of the system; others are used in specific application areas, such as the Internet; some modules can be used in Python for all version numbers and porting, but some are supported only on some system;

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! Thank you.Tolbkni KaoHelp me correct errors The content here is based on the Linux ProcessAnd Linux text stream. The main function of the subprocess package isExecute External commands andProgram. For example, I need to use wget to download files. I call the wget program in Python. In this sense, subprocess functions are similar to sh

The content here is based on the Linux Process Foundation and the Linux text stream. The main function of the subprocess package is to execute external commands and programs. For example, I need to use wget to download files. I called the wget program in Python. In this sense, the subprocess function is similar to the shell.Subprocess and common encapsulation functionsWhen we run Python, we are all creating

The main function of the ubprocess package is to execute external commands and programs. In this sense, the subprocess function is similar to the shell.Subprocess and common encapsulation functionsWhen we run Python, we are all creating and running a process.In Python, we fork a child process through the subprocess package in the standard

Python comes with a lightweight relational database SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites or create tools with data storage needs. SQLite is also widely used in other fields, such as HTML5 and mobile terminals. Sqlite3 in The Python Standard