manipulator module

JSON module:JSON: Information exchange (conversion of strings) to any languageAfter JSON conversion, all types can be converted to double quotation marks before being converted to STRFor example: file reads and writes:1 #Write file:2 ImportJSON3f = open ("Demo.txt","W")4DIC = {"name":"g_l"}5Dic_str =json.dumps (DIC)6 f.write (DIC_STR)7 Print(Type (DIC_STR))8 Print(DIC_STR) 1 # Read file: 2 import JSON 3 f = open ( " Demo.txt ", " R " ) 4 f_read = F.read () 5 f_read = Json.

SYS module Common letter SYS.ARGV: Implements passing parameters from outside the program to the program. sys.exit([arg]): Exit in the middle of the program, arg=0 for normal exit. sys.getdefaultencoding(): Gets the current encoding of the system, which is generally ASCII by default. sys.setdefaultencoding(): Set system default encoding, do not see this method when executing dir (SYS), do not pass in interpreter, can execute reloa

, Format: Compressed package type, "Zip", "tar", "Bztar", "Gztar" Root_dir: Folder path to compress (default current directory), which directory or file to package (that is, the source file) Owner: User, default Current user Group: Groups, default current group Logger: Used to log logs, usually logging. Logger Object Example Import Shutil shutil.make_archive ("Test_package_bak", "Zip", "test_package") #对文件夹下的test_package文件夹进行打包　　Output results11, shuti

, always with the first call to this function's timestamp as the cardinality. Unix always returns the full run time.Example: Test your computer's computational performanceImport timeSum=0Time.clock ()For I in Range (100000000):Sum+=iPrint (Time.clock ())#corei5->16.5 secondsDatatime module:The Datatime module is encapsulated based on the time module and provides a more practical function, and the interface

JSON module There was an eval function that could extract a corresponding data type from a string, such as "{" "Name": "Zhangsan"} "to extract a dictionary." JSON modules can do the same thing, but more powerful, Eval can only recognize the data structure of the Python language. JSON can recognize multi-language data structures Import of modulesImport JSON Encapsulates a data type in JSON format (string) with dumpsDIC = {"name":"cod

Day5 module Learning -- re regular module, day5 module -- re 1. Regular Expression Basics 1.1. Brief Introduction Regular expressions are not part of Python. Regular Expressions are powerful tools used to process strings. They have their own unique syntax and an independent processing engine, which may not be as efficient as the built-in str method, but are very

One, OS module 1 os.getcwd () Gets the current working directory, that is, the directory path of the current Python script work 2 3 os.chdir ("dirname") changes the working directory of the current script; equivalent to the Shell CD 4 5 Os.curdir returns the current directory: ('. ') ) 6 7 Os.pardir Gets the current directory string name: (' ... ') 8 9 os.makedirs (' dirname1/dirname2 ') can generate a multi-level recursive direc

(Bytes_st) #加密 Return M.hexdigest () #返回加密后的结果## sha_256 =hashlib.sha256 (BYTES_YBQ)# sha512 =hashlib.sha512 (BYTES_YBQ)# Print (Sha512.hexdigest ())# Print (dir (m))#md5加密是不可逆的, cannot be decrypted.# MD5 MD5AF# 123456 f0dfb4c958c67903e542e31c729c629b#撞库Import Base64s= ' hahaha 'byte_s = S.encode () #字符串变成二进制res = Base64.b64encode (byte_s) #base64编码Print (Res.decode ()) #把bytes转成字符串.Jie_mi_res = Base64.b64decode (Res.decode ()) #base64编码Print (Jie_mi_res.decode ()) Day5-python

# FromFunction creates an array from a function, a custom function, and an array from a function; # the FROMPYFUNC call format is Frompyfunc (func, Nin, Nout), Nin is the number of input parameters for this function, and Nout is the number of return values for this function. print'b is:%s' %bData Type Objects (Dtype) and structure arrayData type Object, ie. An instance of Numpy.dtype describes how an array object resolves a fixed-size memory segment in memory. It depicts several aspects of the

() #返回当前时间2016-06-05 18:23:30.819466, time plus minusPrint (Datetime.datetime.now ()) 2016-06-11 10:57:57.825386new_date = Datetime.datetime.now () + Datetime.timedelta (days=10) #比现在加10天new_date = Datetime.datetime.now () + Datetime.timedelta (days=-10) # Minus 10 days than now new_date = Datetime.datetime.now () + Datetime.timedelta (hours=-10) #比现在减10小时new_date = Datetime.datetime.now () + Datetime.timedelta (seconds=120) #比现在 +120sTime comparison: True if a match is returnedCur

a The URL is complete, including the QueryString part (that is , the GET request query string part),thehash partHttp://127.0.0.1:3000/b.html?id=123#123At this point the Req.url is:In other words, querystring belong to Req.url, but hash does not belong.Now we want the part of the file nameThe built-in modules are available in node: URL, path, querystring they can all serve URL recognitionvar http = require ("http"); var fs = require ("FS"); var url = require ("url"); Http.createserver ((req,res)+

Introduction to the Linux kernel module the overall structure of the Linux kernel is already very large, and it contains many components. How can we include all the required parts in the kernel?One way is to compile all required functions into the Linux kernel. This will cause two problems. One is that the generated kernel will be very large, and the other is that if we want to add or delete features in the existing kernel, we will have to re-compile

This article describes the Seajs module dependencies between the load and the implementation of the module, the following words are not more directly to see the detailed introduction. Entry method Each program has an entry method, a function similar to C main , and Seajs is no exception. The demo of series one is used in the homepage seajs.use() , this is the entrance method. The entry method can accept

Seajs is a module-loading framework developed by Yuber that follows the COMMONJS specification and can be easily and cheerfully loaded with arbitrary JavaScript modules and CSS module styles. Seajs is very small, compact is compressed and gzip after volume only 4 K, and the interface and method is very small, seajs on two core: module definition and

A previous blog post describes the concepts and basic uses of modules in Python, which act as a basic unit in the Python language and can be used to write common library functions or objects for reuse. At the same time, the module can also be run as a standalone file, previously mentioned, as long as the module file is imported, then PVM will execute all the statements in the

The principles of the webpack organization module and the webpack Module Now, the frontend uses Webpack to package JS files and other files. With the popularity of Node, the front-end engineering method and backend become more and more similar. All things are modularized and finally compiled in a unified manner. Due to the constant updates of Webpack versions and various complicated configuration options, i

Article Title: What is a module and how to write a module. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. I don't know what happened when something like module appeared in Linux. Indeed, it is a major innovation of Linux. Wit

Python BASICS (12)-module, python basics-Module URL: http://www.cnblogs.com/archimedes/p/python-modules.html.Module Introduction If you exit the Python interpreter and re-enter, all previously created definitions (variables and functions) will be lost. Therefore, if you want to write a program that has been saved for a long time, you 'd better use a text editor to write the program and input the saved file

This section is concerned with the implementation of the Nginx central thread pool module;General description(1) thread pool module belongs to the core module, so its configuration memory ngx_thread_pool_conf_t will be pre-applied, and the main management of each thread pool structure in ngx_thread_pool_conf_t;(2) Each thread pool is created and each thread pool

Seajs learning module dependency loading and module API export, seajsapi Preface SeaJS is very powerful. SeaJS can load arbitrary JavaScript modules and css module styles. SeaJS will ensure that you have loaded other dependent modules into the script runtime environment when using a module. By referring to the demo abo