Python

To convert an array or matrix into a list, as follows:>>> from numpy Import *>>> a1 = [[1,2,3],[4,5,6]] #列表>>> a2 = Array (A1) #数组>>> A2Array ([[1, 2, 3],[4, 5, 6]])>>> A3 = Mat (A1) #矩阵>>> A3Matrix ([[1, 2, 3],[4, 5, 6]])>>> a4 = a2.tolist ()>>> A4[

@ Solve sheet in Excel for Chinese acii garbled problemWorkbook = xlwt. Workbook (encoding = ' utf-8 ') #encoding introduce encodingSheet = Workbook.add_sheet (key,cell_overwrite_ok=true)@python Learning

Today added a route table, the routing table do foreign keys, and then added a few groups, the routing table for the group's foreign keys, when I use the delete function to delete the routing table, the competition will also delete my group is quite

1.8 Positioning methods for single elementsFIND_ELEMENT_BY_ID ()Find_element_by_name ()Find_element_by_class_name ()Find_element_by_tag_name ()Find_element_by_link_text ()Find_element_by_partial_link_text ()Find_element_by_xpath

Python Basic Number TypePython System installation Methods Variable Describe all the values that can be changedName= ' Jin 'variable name name assignment symbol '= ' value (values) ' Jin '#变量的三个特性:ID Type Values#使用实例:Print (ID (name)

First, arithmetic operators+-*///(divisible by integer)% (take remainder) * *Second, the comparison character> = Third, part of the code: while num2>0:num =4 while num > 0: print ( " # " , End= ) num -=1 print () num2 -=1 Line =5 and

首先还是老生长谈，说说定义和作用，request模块是一个用于访问网络的模块，其实类似的模块还有很多，不在一一在这里解释。这么多的相似的模块为什么都说只有这个好用呢。因为他人性化。如果你学过urllib之类的模块的话，对比一下就很清楚了（文章url以题目实验吧的唯快不破）。1, no matter what kind of script we all know the first to import the modules we need2, since this module is to

Python Basics:Strings and encodings:In computer memory, Unicode encoding is used uniformly, and is converted to UTF-8 encoding when it needs to be saved to the hard disk or when it needs to be transferred.When editing with Notepad, the UTF-8

list:a=[1,2,3] List value variableTuple:b= (all in a) tuple value is not variableDict:c={' A ': 1, ' B ': 2, ' C ': 3} dict (Key-value) key not variableRead c:c[' a ']Set:d=set ([i]) set (key) No value key for passing in a listRange (5) generates a

Process-oriented VS object-orientedProcess-oriented program design is the core of process (pipeline thinking), the process is to solve the problem of the steps, process-oriented design is like a well-designed pipeline, consider when to deal with

1.submit ()The Submit () method is used to submit the form. You can use the Submit () method to simulate a query after entering a keyword in the search box and pressing ENTER. If you cannot press ENTER to enter the next step, you cannot use the

ListName_list = [' Jia ', ' ao ', ' WN ']or name_list = List ([' Jia ', ' ao ', ' wn ')Basic operation:Index (also called subscript) starting from 0 #help (name_list) is more complex, or Dir (name_list) is moreConcise, ' _add_ ' This has two

First, the installation of requests libraryRequests library as a third-party library that needs to be installedcmd mode, run PIP install requestsSecond, before learning how to send a request, let's take a look at the requests library and see what he

# This is a learning note for the Liaoche teacher Python tutorial1 , overviewThe python built-in sorted () function can sort the list.The sorted () function is also a high-order function that can receive a key function to implement a custom sort,

Accidentally deleted the previous shell script, the previous shell script because the extensibility is not strong, it is intended to use Python to re-implement.There are many methods of port scanning, and I am here to process the results into JSON

Python's functions and methods, defined by Def:Features of the function: Reduce duplicate code To make the program extensible Make programs easier to maintain The difference between a function and a method: The function has a

1. Shape () function In the numpy module Input parameters: Similar arrays (such as lists, tuples), or arrays Returns the tuple of an integer number in which each element in the tuple represents the length of each dimension of the

CentOS 6 system default Python version is: 2.6.6 usually encountered in the use of a lot of library requirements are 2.7.x version of the library, such as using the Configparser library, in the 2.6 repository does not support the configuration items

Reference textLiaoche Python Tutorials TCP is to establish a reliable connection, and both sides of the communication can send data in the form of a stream. The relative tcp,udp is a non-connection oriented protocol. when using the UDP

Examples of Python and selenium and Chrome's primary automation operations #coding =utf-8from Selenium Import webdriverimport os,timechromedriver = "C:\Users\li.liu\AppData\Local\Google\Chrome \chromedriver.exe "'" Environ is an image object for