best python packages

Modules and packages are introduced in the following format, followed by a detailed illustrationImport file nameFrom directory name import file nameFrom directory name. File name Import class nameA. Module1. The module can make the code reusable, reduce the workload, easy to maintain; Implement code sharing, multi-person development, LIB library referenceThe module is the basic way that Python organizes the

Modules and Packages (official website https://docs.python.org/3/contents.html) 1. Modules1.1 A. py file (usually defined as a function or data or method) can be called as a moduleThe 1.2 module can contain executable statements and definitions of functions that are intended to initialize modules that are executed only when the module name is first encountered importing import statements (the import statement can be used anywhere in the program and is

, only the corresponding. pyc file can also be called because the. pyc file can be used as a module.The. pyo file is an optimized version of the. pyc file for the same purpose.Iv. Role of __init__.py documentsThe __init__.py function is to turn the package into a module (using a module like. py)If there is a package name:1. Add the __all__=[' OS ', ' sys ', ' base64 '] variables in the file, and the variables contain the module names that need to be used. This allows the modules in the __DATA__

://httpbin.org/post ', timeout=3.0) print ( R.data.decode (' Utf-8 ')) #让所有的request都遵循一个timeout, you can define the timeout parameter in Poolmanager: http = urllib3. Poolmanager (timeout=3.0)Control of retry and redirection#通过设置retries参数对重试进行控制. The URLLIB3 defaults to 3 request retries and 3 direction changes. r = http.request (' GET ', ' http://httpbin.org/ip ', retries=5) #请求重试的次数为5print (R.data.decode (' Utf-8 ')) # #关闭请求重试 ( Retrying request) and redirection (redirect) as lo

This article describes the python custom module and package 1. save a hello. py file in the F:/data/python directory. Hello. py >>> def hello(x): print x Directory Import >>> Import sys >>> sys. path. append ('F:/data/Python') # Add a path, which is one-time >>> import hello >>> hello. hello (5) # Call 5 2. import the custom module without chang

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!I'll start with the regular expression of Python's standard library. Regular expressions are a common tool in word processing and do not require additional system knowledge or experience. We will explain the system-related packages in the back.The primary function of regular expressions (regular expression) is to search for what you want to find by u

introduced into the global symbol table of the module that executes the declaration.3. Supplement.When a module is import, a new namespace is first created to hold the names of all the variables defined in the module, and all the code within the foo.py is executed within that namespace.The last thing you need to know is that the Import keyword defines a name, but at the moment we use import to define a module name Foo, which is the namespace of the foo.py, and the way foo.is to find the name fr

wayWhen used: module name. function name ()Mode six: Import package name　　Python2 in the __init__.py file can be written in the Import module name through the import package name can be imported __init__.py file written in the module name (this method is limited to Python2)When used: module name. function name ()Description of the. pyc file: the import produces a. PYc bytecode file, This file is the first time that the Python interpreter will

Python packages prebuild for Windows is working in a python Windows environment, sometimes with some nonsensical questions, such as if you want to use Python's bindings for OpenGL, or other libraries ' PythoN API, obviously all dependencies are installed and configured, but there are always some inexplicable problems.F

XML is executed, the module in the current directory is imported instead of the system-standard XML.With this in hand, we can build a package and import it as a normal module, so that we can access each module in the package directly.The package definition in Python is simple, and its hierarchy is the same as the hierarchy of the directory in which the program resides, similar to Java, except that the packages