Python

Brief introductionPython outputs the output as a tabular format through the prettytable module, and Python itself is not built-in and requires a separate installation of the third-party library.Installation1 pip install prettytable1 # Source

1. About the Windows command prompt1) Enter a disk, direct input, for example: Enter e-drive E: Enter2) View the folder under the disk dir3) Enter a file CD folder name4) Enter the folder and then input the file name, enter to run5) CD: To exit to

Cons: Cannot generate random answersnum = 19I_num=-1N=0#a game of guessing numbers, 3 chances whileNum! =i_num:n= n + 1I_num= Int (Input ('Please enter a number:')) ifN : ifI_num >Num:Print("Oh, big.") elifI_num

Python virtualenv Installation Library error ssl:certificate_verify_failed problem descriptionUse PIP to follow virtualenv error, as follows:pip install virtualenvcollecting

The big difference between Python 3 and 2 is that Python itself is replaced by the default Unicode encoding.The string no longer distinguishes between "abc" and U "abc", the string "ABC" is Unicode by default and no longer represents the local

Requirements1. Enter the user name and password2. Verify successful Display Welcome page3. Enter the error 3 times, lock the user nameAlso saw a lot of great God, teacher, Brother's code inspired, just write the following rewrite versionThis code is

Python 2.7IDE Pycharm 5.0.3Objective在爬取的过程中难免发生ip被封和403错误等等，这都是网站检测出你是爬虫而进行反爬措施，这里自己总结下如何避免Method 1: Set the wait timeSome web site precautions may be that you can quickly submit a form as a bot, such as downloading images at a very high speed,

A few days ago, the American group pen questionTitle: Probably asked to enter two sets of numbers, the two sets of values sorted and then output the resultsIdea: Enter two sets of numbers, combine two sets of numbers, sort1List1 = Raw_input ("input

Single-Case mode1, single example is only one instance2. Forge a single case effect by static field + static field3. When to use: Create a singleton mode (eg: Connection pool) When the data is encapsulated in all instancesTo create a connection pool

Dir () View properties (functions and Data Objects)Help () to see the specific assistance documentID () To view the address of the data objectSplit Divider (str---> list):>>> s= "My:name:is:xiaofan">>> s.split (":")[' My ', ' name ', ' is ', '

Take a look at the following section of code: 1234567891011121314151617 origin = {‘a‘:100,‘b‘:[1,2,34,5]}obj_copy ={};print origin;obj_copy[‘key1‘]= origin;obj_copy[‘key2‘]= origin;print(obj_copy)print(‘我们试图改变obj_copy中某个Key值的内容‘)obj_

__author__ = ' Caohuan 'Import TelnetlibImport multiprocessingImport Randomdef telnet (ip,hostname):TN = Telnetlib. Telnet (IP)Print ("Begin Telnet" +STR (hostname) + "...")Tn.read_until ("Username:". Encode (' ASCII '))Tn.write ("NB". Encode ('

Stupid way to learn Python 36th, I wrote the following code: fromSysImportExitdefrule ():Print "congratulations! you are made the right choice." Print "But is also a terrible choice." Print "Abide by the contract of the Devil." Print "Input

Two types of documents are stored under two paths, assuming there are 25 documents for each class of documentDef spamtest ():DocList = []Classlist = []fulltext = []For I in Range (1,26): #循环读取所有的txt, and resolves to a listWordlist = textparse (open (

---restore content starts---Definition of Python function1 def Add (): 2 A = 13 b = 24 c = = A + b5 print(c)6 function is to put a section of the implementation of a function into a package method name, this method is called the

Binding properties, if we directly expose the properties, although it is very simple to write, but there is no way to check the parameters, resulting in the results can be changed casually:s = Student()s.score = 9999This is obviously illogical. To

Reprinted from a static blogMost common download page1 Import 2 response = Urllib2.urlopen ("http://www.baidu.com")3 print response.read ()Post mode1 ImportUrllib2 ImportUrllib23 4Values = {"username":"*****","Password":"*****"}5data

Import requestsYou can use the Magic requests module below!1. Sending data to a Web page>>> payload = {'Key1':'value1','Key2': ['value2','Value3']}>>> r = Requests.get ('Http://httpbin.org/get', params=Payload)>>>Print(r.url)

It's convenient to find a reptile library, and it supports python3!Installation method in Http://docs.python-requests.org/en/latest/user/install/#install很详细But the installation method of Windows is not clear inside, remember Here.1. Go to the link

Leetcode: 1-5 questions code, leetcode1-5 The following are the first five questions that have been flushed during this period of time. They are all solutions that you may think of. They may not be the optimal solution. They are just sorted out to