Python

Basic file Operation:m = open (' Words ', encoding= ' Utf-8 ') #打开文件 (python default character set is utf-8,windows to GBK), no input mode defaults to R modePrint (M.read ()) #读文件Print (M.readline ()) #读取第一行Print (M.readlines ())

fromMultiprocessingImportProcess,pool #进程池ImportOs,timedefRun (i): Time.sleep (1) Print("In the process", Os.getpid ())returni+100defBar (ARG):Print('Bar is', Os.getpid ())if __name__=='__main__': P=pool (5) forIinchRange (10): P.apply_async (

The Hashlib module is introduced here.1.2. EncryptionThe Hashlib module has a number of encryption methods, such as hashlib.sha224 (), hashlib.blake2b (), and so on, where MD5 encryption is used as an example.When encrypting, you cannot encrypt the

Type ()1) Number Int Long Float Complex 2) string (string) STR () value function 3) List (list) List =[' apple ', ' alligator ', ' Gibbon ', ' Salamander '/print (list[2:]) 4) Tuple (tuple)--similar list, read-only5)

A primerThe topic in this section is to implement concurrency based on a single thread, that is, to implement concurrency with only one main course (obviously the only CPU available), so we need to look back at the nature of Concurrency: Toggle +

First, the adorner: (decorator) Introduction: 1, Essence is a function, add additional functions for other functions.          2. The source code of the decorated function cannot be modified. 3. Cannot modify the method of calling the decorated

Declaring a function in Python is similar to declaring a classdef functionname (arge): "function document String" #函数体 #声明类class class name: "Document String for class" class bodyClassic class:Class Chinese: ' This is a Chinese

Recursive functions are simply called self-invocation of functions. Using recursive functions can often make code simple and elegant. Complex problems can be broken down into simple sub-problems. Recursion has unparalleled charm, and from famous

Collection of PythonExample: How do you want to know if the two lists have the same, swollen?Linux = ['SB',' You','Rain']python= ['SB',' You','Mack','Rachel']linux_python= [] forIinchpython:ifIinchLinux:linux_python.append (i)Print(Linux_python)The

The tuple of Python's progenitor tuple ()Tuples and lists are the same. However, there are also differences.Tuples can only have read operations. The delete operation was not modified.　　The list is denoted by the brackets [].　　Tuples are denoted by

#类属性又称为静态变量, or static data, which is bound to the class object to which they belong, and does not depend on any class instanceClass Chinesepeople:Country =' China ' Def__INIT__ (Self,name): Self.name = Name Def play_ball (SelfBall): Print ("%s

I. Advanced features of functions1) List generation, list comprehensions, is a very simple and powerful python built-in build that can be used to create lists.eg list(range(1, 11))　　[1, 2, 3, 4, 5, 6, 7, 8, 9, 10] >>> L = [] >>> for x in

To determine that an object is an iterative object:The method is judged by the iterable type of the collections module.>>> from Collectoins import iterable>>>isinstance (' abc ', iterable) #str是否可迭代>>>isinstance ([1,2,3],iterable)

This article mainly introduces the use of PYTHON3+XLRD to parse Excel instance, has certain reference value, now shares to everybody, has the need friend can refer to The examples are as follows: #-*-Coding:utf-8-*-import xlrddef open_excel (file =

This article mainly introduces the details of the Django Admin component usage and source code analysis, has a certain reference value, now share to everyone, the need for friends can refer to The admin component uses Django provides a web-based

This article mainly describes the python changes already exist in the Excel file method, has a certain reference value, now share to everyone, the need for friends can refer to The package you need to use: Import xlrd import XLWT import xlutils

This article mainly introduces the implementation of Python print by commas or space-delimited method, has a certain reference value, now share to everyone, the need for friends can refer to 1) Press, separate A, b = 0, 1 while B 2) Separate by

This article mainly introduces the implementation of the TensorFlow to implement the logical regression algorithm, has a certain reference value, now share to everyone, the need for friends can refer to This paper will implement the logistic

This article mainly introduced the Python Pycurl authentication basic and the Digest authentication method, now shares to everybody, also gives everybody to make a reference. Come and see it together. Brief introduction The pycurl is similar to

This article mainly introduced the Python in the string to add the variable instance explanation, has the certain reference value, now shares to everybody, has the need friend to refer to Sometimes we need to add the appropriate variable to the