Python

1: Send a request with a cookieRESP = Requests.get (Self.url_item_list_first_page, cookies=self.cookies)' http://httpbin.org/cookies '>>> cookies = dict (cookies_are='working')>>> r = Requests.get (URL, cookies=cookies)>>> r.text'{"cookies":

The list uses [] to identifyThe list and the arrays in PHP are similar including the use and access methods are similarcan be accessed directly using the subscript indexJust a few examples, it looks comfortable.names =

for in range: with open (R'C:\Users\admin\Pictures\ picture _20180608133815.jpg ','rb') as F,open ('c:\\users\\admin\\pictures\\test%s.jpg '% i,'wb') as ww: dat=f.read () Ww.write (DAT)How to copy 10 pictures in one breath?This

Exercise 1:info = [{' wangming ': {' money ': 1111,' car ': [' BMO ', ' BSJ '],' info ': {' phone ': 1511111,' age ': } }, {' Lilei ': {' money ': 99999,' car ': [' BBB ', ' CCC '],' house ': {' Chaoyang ': 1,'

Crawling Web pages:Http://www.cnblogs.com/xrq730/archive/2018/06/11/9159586.htmlCrawling is the textual content of a blog Use requeusts to obtain HTML information for the entire Web page; Parsing HTML information using beautiful soup

1. A simple string methodName= ' HelloWorld 'A= Name.strip () #默认去掉两边的空格和换行符A = Name.lstrip () #默认去掉左边的空格和换行符A = Name.rstrip () #默认去掉右边的空格和换行符A = Name.count (' l ') #查找某个字符在字符串出现的次数A = Name.find (' m ') #查找这个字段, returns its subscript, if not

1. Method1classsolution (object):#@return A tuple, (index1, Index2) deftwosum (self, num, target): D= {} forI, EinchEnumerate (num):ifEinchD:returnD[e] + 1, i + 1D[target-E] =i s=solution ()Print(S.twosum ([0, 2, 1, 0], 0))Print(S.twosum (

The same variable in Python can be assigned repeatedly, and can be a variable of different typesA = 12print (a) #此时输出整数a = ' Cindy ' Print (a) #此时a是字符串A language with a variable type of invariant is called a solid State language , and a

I. Introduction to the Collection1. The collection is born to go heavy2. The set is also unordered3. The role of the set is mainly relationship testing, testing the intersection of two sets of data, difference set, set, subset, parent set, symmetric

1) Read Excel, use XLRD moduleImport xlrdBook =xlrd.open_workbook (' App_student.xls ')Sheet=book.sheet_by_index (0) #根据顺序获取的# sheet2=book.sheet_by_name (' Sheet1 ') #也可根据名字获取# Print (Sheet.cell (0,0). Value) #指定sheet页里面行和列获取数据#

Usage of Map——、 us to analyze the source code of the map in PythonClass Map (object): """ Map (func, *iterables)---Map object Make a iterator that computes the function using arguments fromA function that computes an iteration from each

1. File processing moder 以读的方式打开w 以写的方式打开a 以追加的方式打开r+ 以读写方式打开w+以读写方式打开a+以读写方式打开rb 以二进制读的方式打开wb以二进制写的方式打开ab以二进制追加的方式打开rb+ 以二进制读写的方式打开wb+以二进制读写的方式打开ab+以二进制读写的方式打开f=open(‘新建文本文件.txt‘，‘r‘,encoding=‘utf-8‘)for line in f:print(line)f.close()with

The mode of opening a file is:1, R, read-only mode "default".2, W, write-only mode. "Unreadable, does not exist, is created, the content is deleted"3, A, append mode. "Readable, non-existent, created, only append content exists"Second, + means you

When defining a function, we determine the name and position of the parameter, and the interface definition of the function is completed. For the caller of the function, it is sufficient to know how to pass the correct arguments and what values the

Sticky bag phenomenonLet's make a program that executes commands remotely based on TCP (1: Execute Error command 2: Execute LS 3: Execute ifconfig)Note Note:res = subprocess. Popen (Cmd.decode (' Utf-8 '),Shell = True,stderr = subprocess.

Recently need to make a part of the data, need to use the name, and the script to generate some random combination of Chinese characters, rather than crawling some seemingly real names on the web, so find the surname Daquan website, url:

The main point here is greedy match and non-greedy match greedy match: matches as many characters as possible; non-greedy match: matches as few characters as possiblePython's regular match is a greedy match by defaultExample:>>> Re.match (r'^ (\

Python3 Process 4Inter-Process synchronization Mutex method:From multiprocessing import LockCreate a process Lock objectLock = Lock ()Lock.acquire () Lock the critical sectionLock.release () unlocks the critical sectionDescription: 1, the concrete

About the remaining data types: stringStrings are ordered, immutable (immutable means that the variable A is re-assigned without overwriting the original value, but instead opens a new memory address in memory that stores the value of the

Collection Composition of different elements Disordered The elements in the collection must be immutable types (numbers, strings, tuples) Definition of the collection:s = {1,2,3,3,4}s = {' Hello '}Transformations can only be