how to use for loop

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A simple process pool version of the crawler

# http://www.doutula.com/article/list/?page=1 First Page# http://www.doutula.com/article/list/?page=2 Page# # # Home in the specific package link# #图片链接# matches multiple lines of Reg = Re.compile (reg,re. S#这里是需要的python包Import requestsImport

Shell Exercises (ii)

Exercise 1: Counting Memory usageRequirements: Write a script that calculates the amount of memory that is consumed by all processes in the Linux system. (Hint: use PS or top command)Reference Answer:#!/bin/bash# date:2018 February 6 # using top to

Python Getting Started Practice _ Login

After learning simple conditional judgments and loops, do a little exercise and write a program about login.USERNAME,PASSWD temporarily writes dead in the program, subsequent learning how to read from the file.Program Requirements:(1) Let the user

Python Basics-List

######################################################################### str# name = "Alex"# list # classes, lists# li = [1, 9, "age", ["Shi Zhenwen", ["19", 10], "Pommeron"], "Alex", True] # objects created by the list class, Li# List Class# An

50 Classic Java Programming questions (directory)

50 Classic Java Programming questions (directory)Title from: http://blog.sina.com.cn/s/blog_60fafdda0100wb21.html "Program 1" Testrabbit.javaTitle: Classical Questions: There are a pair of rabbits, from the 3rd month after birth a pair of

Building Python Automation use case framework--problems

Problems encountered in building the Python automation framework process based on 76572411:One, the lack of test kits: The test set code is as follows, will run all the E:\Software\sichuantest\test\case directory and test_*.py matching use

Method of "Java" in arrays to int array, integer array and int array

In java.util.*, arrays seems to be useful, and it seems that using the in-loop method avoids the need to write the lookup, initialization, and sequencing of the array.First, to talk about the arrays in the shape of the array really useful method1,

Using Python multi-threading to implement producer-consumer patterns crawl the image of the bucket graph network

What is the producer consumer modelSome modules are responsible for production data, which is handled by other modules (the modules here may be: functions, threads, processes, etc.). The module that produces the data is called the producer, and the

Python learns lesson five! List

List lists# list classes, lists#中括号括起来#, separating each element#列表中的元素可以是数字, String, List, Boolean ... All of them can be put in.Put anything inside #就是个 "collection"#索引取值#切片结果也是列表Li = [ Zhang Mingshing ,'star', [' 19,3],' jiege '# objects created

Python basic growth path four-basic data type method

1, three major processes of program development: Order--execute code from top to bottom Branching-determines the branch that executes the code, judging by the condition Loop--to let specific code repeat the execution 2,whlie

Java Exercise (iii)--Number of daffodils

Title: Print out all the "daffodils", the so-called "Narcissus number" refers to a three-digit number, its number of cubes and equal to the number itself. For example: 153 is a "narcissus number", because the 153=1 three times the square +5 of the

C # arrays

An array is a data structure that can contain multiple elements of the same type, and array elements in C # start from zero.Arrays can be divided into: simple arrays, multidimensional arrays, and jagged arrays.Simple array1. Declaration and

C + + linked list to delete duplicate data

List.h#include typedefintDataType;structnode{Node ():d ATA (0), Pnextnode (NULL) {}//Node ConstructorsDataType data; Node*Pnextnode;};classlist{Private: Node*head;//the only head pointer as a linked list intSize//Linked list length Public: List ()

List<t> performance comparisons using different methods when searching and sorting

First: In the. net1.1, I also have a lot of programmers like me, will be used to ArrayList, at that time to find this collection element, most of the use for loop to complete, of course, can also use the BinarySearch method. But since there are net2.

About Java Classic Algorithm 40 (Super practical version) _java

"Program 1" topic: Classical question: There are a pair of rabbits, from the 3rd month after the birth of a pair of rabbits every month, the rabbit long to the fourth months after the birth of a pair of rabbits, if the rabbit is not Death, ask the

Tsinghua University published a multiplier series of JavaScript full source code _javascript tips

Tsinghua University published the " The first chapter of JavaScript introduction 1. Enter a JavaScript statement in the address bar Javascript:Document.write ("Show text") 2. Embed JavaScript in an HTML document Chapter II using Variables and

Shell two files go heavy multiple postures _linux shell

Objective We all know that the shell has a great advantage in text processing, such as multiple text merging, heavy, and so on, but recently encountered a difficult problem, that is, two large data files to heavy. Let's take a look at the detailed

Shell scripts fall into three categories: logon scripts, interactive scripts, non-interactive scripts

Shell scripts fall into three categories: logon scripts, interactive scripts, non-interactive scriptsOneThe logon script is similar to the logon script in the computer settings under Windows and the collection of logon scripts under Account settings

Javase Basics of the Java Learning Path 3

All code is untested:1:for the format of the loop?For loop format:For (initialize an expression; a conditional expression; an action expression after a loop) {Circulation body;}Execution process:* A: Execution of initialization statements* B:

List of Python

List of lists:1 #Li = [one, one, one, one, and one]2 #Parameters3 #1. The original value was last appended4 #object. Method (..) # Li Object calls the Append method5 #li.append (5)6 #Li.append ("Alex")7 #li.append ([1234,2323])8 #Print (LI)9 #2

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