print 1 2 3

Enumerate (iterable,start=0)(the subscript start position of the custom list) list variables, to define the number of open: default is 0 start#!/usr/bin/env python#-*-coding:utf-8-*-a=["Juvenile","Youth","Adult","old age"] forKvinchEnumerate (a,1):

Python references and objects in a detailed@[(Flying Elephant) The variable name and object are separated in Python Example 1:a = 1This is a simple assignment statement, the integer 1 is an object, A is a reference, and an assignment

http://blog.csdn.net/jerr__y/article/details/53188573This article mainly refer to the following article, the text of the code is basically the second article of the Code handwritten implementation of a bit.-PCA Explanation:

1 #Encoding:utf-82 3 #input in Python3 equivalent to raw_input in Python2 (raw)4Content = input ('Please enter the content, which is treated as a string:')5 Print(content)6 7 #You can also use the contents of input as code to handle8Content = eval

1. The first computer CPU: the central processing unit, the equivalent of the brain, Computing and Computing Center memory: temporary storage data (ROM) for the CPU to calculate the advantages: fast reading Speed disadvantage: Small capacity, high

1. output digital sequence 1,2,3,5,8,13,21 ..., the number of outputs is entered by the keyboard. Note Input using scanf inputA =1 b=0//a = 1 b=1//a= 2 b=1//////For example:////input 3 output for////1//2//3////input 4 output for//1//2//3//5int main (

Once run, the warehouse on the Gitolite server can be backed up to the local. The first run creates a local mirror of the remote warehouse, which updates the local mirror each time it runs. This program only supports SSH mode Other GIT servers do

First, CPU information collection 1). Collect CPU Usage rate Acquisition algorithm: collecting and calculating CPU total utilization or single kernel utilization through/proc/stat file. Taking cpu0 as an example, the algorithm is as follows:1. Cat/

Configuring through IIS Hold WIN + R Open command Line input inetmgr Open IIS Management Left directory Select target site, in the right IIS block, double-click the Error Pages In the Error Pages on the right side of the Actions, select

For loop Earlier in this series, "Explore Python, part 5th: Programming in Python" discusses the IF statement and the while loop, discusses compound statements, and appropriately indents Python statements to indicate the associated Python code

has been doing performance screening, the idea is based on the analysis of Nginx log, get the response time of the URL, as well as the request times, and then get the request amount of time, concurrency, analysis is the cause of concurrency, or

Let's start with an example:File A, which is the average number of floating-point numbers in the first column of the file a that are floating point numbers. You can do it in awk, just one word.$cat A1.021 331#.ll 442.53 6SS 7 awk ' begin{total =

1) Raw_input: terminal input, input as "string"Print user input user name and password #!/usr/bin/env python# -*- coding:utf-8 -*-#getpass模块提供了三个方法 (the module is not available in Pycharm): #1) Getpass.getuser ()    Get login user name # #)

Nginx Access Log Log Statistics Analysis Common command IP related statisticsStatistics IP Traffic‘{print $1}‘ access.log | sort -n | uniq | wc -lView IP traffic for a time period (4-5 points)grep "07/Apr/2017:0[4-5]" access.log | awk ‘{print $1}‘ |

# #思路1Use awk to isolate the IP to 4 segments and then invoke it through a for loop#!/bin/bashSTART_IP="192.168.2.1"j=1for i in `echo $START_IP|awk -F. ‘{print $1,$2,$3,$4}‘`do eval IP$j=$i echo "$IP"$j"" The main difficulty of this idea1.

Awk is also a streaming editor, which is more powerful than SED1. Intercepting a paragraph in a documentawk -F ‘:‘ ‘{print $1}‘ /etc/passwd |head -2-f Specifies the delimiter, without specifying a space or tabPrint Action for printing$ $ for the

(1) awk principleThe principle of awk is to process the data in a file line by row, find content that matches what is given on the command line, and then program the next step if a match is found. If no match is found, continue with the next line.(2)

System Tuning Parameters:L = A (arrival rate) * W (total service time)L LOWER the better, w lower the betterAwk is simple to use:1.awk-f: ' {print '} '/path prints the first column of data with ': ' As a delimiter2.df-p | awk ' {print $ ' is mounted

Errors were made when using these two modules, summarized as follows:1.printPrint will automatically add line breaks when printing, for example: for in xrange (1,5): ... Print 1234If you want to block line breaks, add a comma to the argument,

Linux DDOS and CC attack SolutionBackgroundNowadays, DDOS attacks are becoming more and more frequent. DDOS Denial-of-Service can be implemented without any technology. Some webmasters often report mysql 1040 errors on their websites, and their