best python packages

Example Comprehensive utilization of two packages of a similar to Linux under the LS function: Copy Code code as follows: #coding = UTF8 Import glob Import os.path Path = '/users/zik Ong/pictures ' def ls (path): #codinf = UTF8 print "--name----type----size----atime----mtime--" nbsp; Path = path + '/* ' filelist = Glob.glob (path) for filepath in filelist: out = '%s%s%s%s% S

Random.sample (sequence, k), randomly fetching fragments of the specified length from the specified sequence. The sample function does not modify the original sequenceNumpy.nonzero () Return The indices of the elements that is non-zero.>>> a = Np.array ([[1,2,3],[4,5,6],[7,8,9]]) >>> a > 3array ([False, False, false], [True, True, true], [True, True, true]], Dtype=bool) >>> Np.nonzero (A > 3) (Array ([1, 1, 1, 2, 2, 2] ), Array ([0, 1, 2, 0, 1, 2])

Foreplay partStand-alone ProgramCommand-line argumentsModules and Import statementsImport ModuleImporting modules using aliasesPart of the Import moduleModule Search PathPackageSetDefault () and defaultdict () handle missing keysUsing the counter () countSorting using ordered dictionaries ordereddict keysDual-ended sequence: stacks and queuesUsing the Itertools iterative code structureUse Pprint () friendly outputSeventh Python box: modules,

defaultsPrint (key)Print (config.options (' bitbucket.org ')) # with For loop, find all keys under ' bitbucket.org 'Print (Config.items (' bitbucket.org ')) #找到 all key-value pairs under ' bitbucket.org 'Print (Config.get (' bitbucket.org ', ' compression ')) # Yes Get method takes deep nested valuesWhen we need to call the system's command, the first thing to consider is the OS module. Use Os.system () and Os.popen () to operate. However, these two commands are too simple to perform complex op

#!/bin/env/bashfind. -type f |grep Py|xargs grep-e ' ^from|^import ' | Awk-f "py:" {' Print $ '}|sort|uniq>res0.logsed-i ' s/from/import/g ' res0.logcat res0.log |awk-f ' import ' {' Print $ ' }|awk-f '. ' {' Print $ '}> res1.logsed-i "s/,[]*/\n/g" res1.logsed-i "s/\s/\n/g" Res1.logcat res1.log|sort|uniq |while Read lined o echo ' pip list|grep $line ' >> res2.logdoneawk NF res2.log > Res3.logsed-i ' s/(/==/g ' res3.logsed-i ' s/)// G ' Res3.logsed-i "s# #\n#g" Res3.logsort Res3.log|uniq >reques

First, the use of the module import1 What is a module?The module is a set of functions of a system, in Python, a py file is a module, such as module.py, where module name modules2 using Modules2.1 Import ModuleThree things happen in the first import module1. Create a namespace for a module2, the execution module corresponding file, will produce the name in 1 the name space3, in the current execution file to get a module name, the module name points to

First, the moduleWe've learned a lot of modules before, and today we'll take a look at how they're used.1.importFirst, customize a module my_moudle.py, that is, the file name is My_moudlePrint('From the my_moudle.py') Money=1000defread1 ():Print('My_moudle->read1->money', Money)defread2 ():Print('My_moudle->read2 calling Read1') Read1 ()defChange ():Global Money Money=0My_moudle ModuleImport statements can be used anywhere in the program, and for the same module is import multiple times, in orde

Problems encounteredIf you encounter title problems with Pip Install or easy_install to install Python's various package on your Mac, seeing this essay should solve the problem.Before are directly installed on the VPS using the Python framework and package, did not expect to install the Mac on the time of this trouble, the first thought is to see if anyone on Baidu has the same problem, the result is very disappointed. Although there is no useful answ

, and will not be executed as a module import) __name__ when the current file is run directly, the result is __main__ __name__ is the module name when the file is imported as a modulehow modules are imported 　 1.import Module Name2.import Module name as Alias3.from Module Import function/class4.from Module Import *Storage of ModulesImport SYSSys.path #获取当前搜索路径的列表sys.path.append (custom path) #将自定义的路径添加到列表中load order of modules 　　 steps to import a module operation:1. Detect if the current module

Python can use Easy_install for various package installations or package offload using Easy_install-m package-name, but there is a problem that the installed version cannot be controlled.Using the source code to install a variety of packages can be extracted after unpacking the package in the root directory of the Python setup.py install installation, but uninsta

("./filePackage/test.txt") a.printFilePath(); a.testReadFile();Directory structure:If __init__.py not write anything, then in the main.py can also write:import filePackage.fileif‘__main__‘: a = filePackage.file.MyFile("./filePackage/test.txt") a.printFilePath();However, it is not recommended to do so, and it is recommended to expose the common classes in the module as described above and refer directly to them. Copyright NOTICE: This article for Bo Master original article, without Bo

In the Pycharm ...When two py files are in the same folder. Directly from the file name import * canWhen two files are in a different folder. You need to include the _init_.py file in the file. There is nothing to write about. But this file is required.Then import the folder name. py File Name import * To invoke a different folderA folder B folder _init_.py d.py c.py e.pyC in Import e:From e Import *C in Import D:From the B folder. D Import *Import C in D:From a folder