Python

The Python language contains 6 built-in sequences, of which there are two main types: lists and tuples.Lists can be modified, and tuples are not allowed, and if you want to add or remove certain elements, you can only use a list, in order to

Directly on the code1 defNew_report (test_report):2Lists = Os.listdir (Test_report)#list directories under All files and folders saved to lists3 Print(list)4Lists.sort (key=LambdaFn:os.path.getmtime (Test_report +"\\"+ fn))#Sort by Time5File_new

One, sliceFirst we have to remember that the objects that can be used for slicing in Python are lists, tuples, and strings. Slicing is a simple and practical way to choose what we want directly from a list, a tuple, or a string.>>> L = list (range)>>

1. View the usage of reducein the Python command viewImportfunctools Help (Functools) to help (functools.reduce) or fromFunctoolsImportreduce Help on built-inchfunction reduceinchmodule _functools:reduce (...) Reduce (function, sequence[,

JSON (JavaScript Object Notation, JavaScript objects representation) is a form of data that is often used in network transmissions.In Python, the dictionary is often converted to JSON for sending, using the main method of dumps:Import= {'name':'Nick'

# 插入排序def insert_sort(elems): forinrange(0len(elems)): = elems[i] = i while>0and elems[j-1> x: = elems[j-1] -=1 = x return elemsIdea of inserting sort: Let's say the list is in the

Recently downloaded a batch of video from the Baidu cloud disk, however, these video filenames have ads. I felt uncomfortable when I was a neat freak, so I tried to change it. But a change of file name is too troublesome, Lenovo to the amateur saw

First, process-oriented programming#1, first emphasize: process-oriented programming is definitely not a function of programming so simple, process-oriented is a kind of programming ideas, ideas, and programming ideas are not dependent on specific

Multithreading for IO-intensive, multi-threaded implementation of two ways, see the example belowExample:Import threadingClass MyThread (threading. Thread):def __init__ (self, args):#使用super写法, rewrite directly in the way that the parent class.

#!/usr/bin/env Python3#-*-Coding:utf-8" "loop (Loop) iteration (iterate) recursion (recursion) traversal (traversal) Fibonacci sequence" "A, B= 0, 1 forIinchRange (4): A, B= B, A +bPrint(a)deffibs (n):" "This is a Fibonacci sequence" "result= [0, 1]

1 definitionsNames=[]names=[1,2,1,1,1,]Names=[1. ' 10 '. [[]]2 adding elementsNames.append () Names.insert (0,10) names.extend ([0,1]) cannot names.extend (1)3 Deleting an elementNames.remove (1) names.pop (1) names.pop del Names[0]4 modifying

#Encoding=utf-8#tuples, like lists, are also a sequencePrint(A)PrintThePrint(1,)Print1, a=1Print(Type (a)) a=1,2,3Print(Type (a))#The tuple function (tuple) takes a sequence as an argument and turns it into a tuple, and returns if it is a tuplea=[1,2

Unpacking is to extract each element of a sequence or map separately, and a simple use of a sequence unpacking is to extract the first or previous elements separately from the following elements, for example:First, seconde, *rest = sequenceIf there

A list consists of a series of elements arranged by a particular element. Using [] in Python to represent a listsuch as:: Bicycles = ["Trek", "Cannondale", "Redline", "specialized"]To modify a list:Bicycles.append ("Car") #在列表尾部添加新元素Bicycles.insert (

1. Set operationFeature: Go to weight, turn a list into a set, automatically go to the weight, the symbol {} representss = set ([3,5,9,10]) #创建一个数值集合t = Set ("Hello") #创建一个唯一字符的集合T.add (' x ') #添加一项 s.update ([2,4,6]) #添加多项T.remove (' x ') #删除Len (s)

msg = "Beijing"Print (Msg.encode (encoding = "Utf-8")) #字符串转换为二进制数据 (parameter preferably plus utf-8, if not, the system default parameter, may not be utf-8 encoding)Print (Msg.encode (encoding = "Utf-8"). Decode (encoding = "Utf-8") #二进制数据转换为字符串

IIS Deployment1. Enable or disable Windows features, choose Install CGI, I have installed here.2. After installation, reopen IIS to see CGI3. Configuring ISAPI and CGI restrictions4. Add the upper right corner, the path is the Python installation

One, based on double underline cross-table query (join query)In the previous article, we briefly introduced object-based cross-table queries, and this chapter will continue to explain the two-underscore cross-table query, using tables created in the

Download the Python version under Windows from the official website and install it all the way by default.The steps to configure environment variables after installation are as follows:1, click "My Computer", right click "Properties"2, select

This paper mainly explains the Pythonip address processing module, ipy the module can be easily processed IPv4 and IPV6 address, the following this article mainly on the Python automation transport Koriyuki IP Address processing module related data,