most useful python modules

1. Modules and PackagesA package is a way to organize the Python module namespace by using the module nameWhether it's in import or From...import form, it's the first time to be alert when you encounter a dot in an imported statement (rather than in use): It's about the package. Import syntaxThe essence of a package is a directory containing __init__.py filesIn the case of imports, the left side of the poin

This is a good way to implement module overloading after reading the Python Learning Manual, which can be implemented to reload a module that has already been loaded in a running program, and the module can be recursively implemented to reload other modules referenced within the module to be reloaded."" "Reloadall.py:transitively Reload nested Modules" "" Import

, this module is often combined with boa-constructor use, the specific use of self-BaiduIn addition, the module used to write GUI programs and the Pyqt4,eric module, and a pythonide Winpython after the installation of Python code, the integration of the QT designer to write the GUI, which is relatively convenient, Similar to VC direct pull control up Note:python module Many, when you need to use the time to install, but regardless of which module to i

In this paper, the use of Optionparser module in Python is described in detail, which has good reference value for learning python in depth. Share it for everyone's reference. The specific analysis is as follows: In general, there are two built-in modules in Python to handle command-line arguments: One is getopt, "dee

Python Module Installation methodOne, multi-file module, with setup.pyDownload the installation package directly, unzip it, Enter directory via cmd command, direct python setup.py installNote: Direct double click error is easyDirectly copied to the Python installation directory \python27\lib\site-packages\ or \python27\lib\ directory can be, but the general lip d

, this is not much to saySummarize and see Python's Package search pathPython searches the following path for the module it wants to find:1. folder where the program resides2. Installation path of the standard library3. The path that the operating system environment variable Pythonpath containsAdd the path to the custom library to the Python library path, as in the following two ways:1. Dynamically add a library path. Modify the value of Sys.path duri

2018-08-28 22:04:511. Download to the desktop and unzip it into the Python directory--------------------------------------------------------------------------------------------------------------- ------------------------------------------2. In cmd enter the following f:\>cd/d F:\python\python3.5.2\Lib\requests-requests-9cfd292 press ENTER,Enter F:\python\python3.

1. Import the module in Python: Import sys; the equivalent of importing packages, classes in Java.For example, we import the SYS module, using: Import sys;2. When calling a function in Python, the module you are calling is searched from the default configured library folder (Sys.path). The directory configuration for this library file is as follows:The Sys.path is used to configure the

----path to >module_name.py-->sys.path# The essence of the import package is to execute the _init.py file under the package. So you can add such as from within the __init__. Import a module name# this way, to pre-explain a module inside the package, so that the module can be used.# 4. Import optimization# from module Import function name# simple optimization.# 5. Label Library# 1.time with datetime# strftime ("format", struct time)---> "Formatted string"# strptime ("formatted character thing", "

accepting the stream object and saving the serialized data to a disk file, this function simply returns the serialized data. the loads () function performs the same deserialization as the load () function. Instead of accepting a stream object and going to the file to read the serialized data, it takes the object directly back from the Str object that contains the serialized data. Cpickle is pickle a faster C language compiled version. Pickle and Cpickle are equivalent to Java serialization and

= NumValue (32,2);p rint (A, b);Output Result:16.0 0.0To load all the contents of a module into the current namespace , you can also use:From module Import *;a,b = NumValue (32,2);As with objects, you can use the dir () function to list the contents of a moduleImport Module;print (dir (module));Output Result:[' __builtins__ ', ' __cached__ ', ' __doc__ ', ' __file__ ', ' __loader__ ', ' __name__ ', ' __package__ ', ' __spec__ ', ' NumValue '] How do I get help?we've been in touch. __doc__ hel

stitchingSerialization ModuleThe process of converting an original dictionary, list, and other content into a string is called serialization.Only strings can be stored in the fileconverting data types in programs to STRApplication:1. Save File2. Network TransmissionPurpose of serialization1. Persisting custom objects in some form of storage2. Passing objects from one place to another3. Make the program more maintainableData structure to STR is serializedThe inverse of the turn is deserializatio

Module:The module is essentially a Python file that writes the Python code inside the module.Module Categories:Standard library: Python built-inOpen Source module: third partyCustom modules: Write your ownOne, OS, sys moduleImportOS, sysPrint(OS.GETCWD ())#Get current directoryOs.chmod ("/usr/share", 7)#Add permissions

1. Definition of modules and packages:Modules are used to logically organize Python code (variables, functions, classes, logic: Implementing a function), which is essentially the. Py end of the python file (file name: test.py, corresponding module name: TEST)The package is used to logically organize the module, essentially a directory (must have a __init__.py fil

Python common modules-random number moduleYun ZhengjieCopyright Notice: Original works, declined reprint! Otherwise, the legal liability will be investigated.I. Examples of common methods1 #! /usr/bin/env python2 #_*_coding:utf-8_*_3 #@author: Yinzhengjie4 #blog:http://www.cnblogs.com/yinzhengjie/tag/python%e8%87%aa%e5%8a%a8%e5%8c%96%e8%bf%90%e7%bb%b4%e4%b9%8b% e

customizable GNU text editor. It can be configured as a full-featured, free Python integrated development environment.Emacs is popular in Python development, and he offers out-of-the-box python via Python-mode. Emacs can add more advanced features through additional expansion packs.The Ides mentioned above each have t

variable name in this fileImport module name as renamed Module name: Improved code compatibilityImport Module 1, Module 2From module name import variable name Use the variable name directly to complete the operation If there is a conflict with the same variable name in this fileFrom Module name Import * Put all the variable names in the module into memory If there is a conflict with the same variable name in this fileFrom Module name import * and __all__ are a pair Without this v

Referencing in Python is a very simple thing, where you need to know three concepts to package, module, class. Class This is needless to say. The module corresponds to a. py file, so module_name is the file that removes the file name from the. py file, which can directly define variables, functions, and classes. So the package we can think of as a folder containing __init__.py and a series of. py files to distinguish between packages and ordinary stri

interpreterSys.version_info ' final ' indicates the final, also ' candidate ' represents a candidate, indicating the version level, whether there is a subsequent releaseSys.getdefaultencoding () returns the default character encoding format you are currently usingSys.getfilesystemencoding () Returns the encoded name of the Unicode file name converted to the system file nameList of built-in modules imported by the Sys.builtin_module_names

Python is powerful, but existing modules may not meet the people's growing material and cultural needs, and sometimes need to write extension modules to improve.There are a number of possible options: SWIG, Weave, cTYPES, BOOST ...Boost is undoubtedly one of the fastest development scenarios. The following describes how the simplest C + + HelloWorld program becom