best python packages

Modules are the methods used to organize Python code, while packages are used to organize modules.When the code is very large, we usually divide the code into several organized pieces of code, and then there is a certain connection between each code snippet. The code is shared, so Python allows a module to be transferred, allowing the use of other modules ' prope

Brief Introduction to Python modules and packagesWe often use packages written by others. If we use Python3.4 and install it in the C root directory of windows, the external packages are generally placed in: C: \ Python34 \ Lib \ sit-packages. py files exist separately, and there are

　　Sometimes the PIP installation Python package fails with a hint that the package that matches the environment is not found. You can try the manual installation.For manual installation of Python packages, such as Chardet, you need to download the decompression and put it under the Lib->site-packages (

Problem: Project-Customized packages, Python often cannot find packages when executingpython Find the path to the package: the Lib package under the Python installation path and the package under Pythonpathyou can use [Sys.path] to print out the path for Python to find a pac

. For example, under the CPython3.3 version, the spam.py module is cached as __PYCACHE__/SPAM.CPYTHON-33.PYC. This naming convention guarantees a multi-version coexistence of compiled results.Python checks that the modification time of the source file is compared to the compiled version and needs to be recompiled if it expires. This is a completely automated process. And the compiled module is platform independent, so the same library can be shared between different architectures of the system,

with [global] HOST = foo A command Specific section in the config file [host = bar ove Rrides the option with same name in the [global] config file section Command completionPip comes with the Support-command line completion in bash and zsh.To setup for bash:$ pip Completion--bash >> ~/.profileTo setup for zsh:$ pip Completion--zsh >> ~/.zprofileAlternatively, can use the result of the completion command directly with the Eval function of your shell, e.g . By adding the followin

Summary of installation and uninstallation methods for various packages such as djangoweb. pygearman installed in python Python can use easy_install to install various packages or use easy_install-m package-name to uninstall the packages. However, the installation version

For mathematicians, the language of Python has a lot to appeal to them. For example: support for containers such as tuple, lists, and sets, using symbolic notation similar to traditional mathematics, as well as a list derivation that is similar to the structure of the set derivation and set (Set-builder notation) in mathematics. Other features that attract math enthusiasts are iterator (iterators), generator (generators), and related itertools

to implement There is no doubt that it is safer to fail the program accidentally because of some minor negligence. Try: Except this exception handling mechanism is to replace if that way, allowing your program to enhance robustness and fault tolerance without sacrificing readability Exception types are customized for each exception (Python unifies classes and types, type is a Class), and for the same exception, a except can be

Python modulepython modules are the basic way to organize your codePython scripts are saved with a text file with the extension py, and a script can be run either alone or in another script. When a script is imported to run, it is called a moduleCat test.py#!/usr/bin/python#coding: Utf-8From __future__ Import Divisiondef a (x, y):Print X+ydef b (x, y):Print X*yCat new.py#!/usr/bin/pythonImport TestTEST.A (O

1. Module1. In Python, a. py file is called a module.2. Large Greatly improves the maintainability of the code. 3. Writing code does not have to start from scratch. When a module is written, it can be referenced elsewhere650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/9B/EE/wKioL1lo0KaR-BsyAABCJMRCmbs721.png "title=" 50RCY ]iyfqpb3duehk ' J}s5.png "alt=" Wkiol1lo0kar-bsyaabcjmrcmbs721.png "/>2. Package* What if different people write the s

functions in support.py, the directory structure is as follows:|--test.py|--support.pyThe code in support.py is as follows:def print_func (PAR): Print " ", par returnThe code for the test.py call is as follows:# !/usr/bin/python # -*-coding:utf-8-*- # Import Module Import # The functions contained in the module can now be called Support.print_func ("runoob")To import a sub-catalog fileIf you need to introduce a file under a subdirectory, you c

Module: A module is a file containing Python definitions and declarations, and the filename is the suffix of the module name plus the. Py.In fact, the import loaded module is divided into four general categories:1 code written using Python (. py file)2 C or C + + extensions that have been compiled as shared libraries or DLLs3 packages for a set of modules4 built-

problem: Module ' pip ' has no attribute the ' main 'Before learning the Python crawler video by chance to see a lecturer directly in the Pycharm to install the package, for small white and only know that the PIP install command under CMD installation is very novel to me.Also, the benefits of installing packages directly in Pycharm have two:01, when writing a Python