Python

Commonly used composite data types in Python Sequence type List: Use ' [] ' to create, such as ["Hello", "World", "Hello", "Python"], the list is a Mutable object, supporting the original modification (that is, it can be

There are two basic loops, for loops and which loops For Loop basic format: The For statement is a circular control statement in Python. Can be used to traverse an object and also have an optional else block attached, which is used primarily to

Before writing the solution, make a list Special characters in Python regular expressions:^ indicates that matching characters must be at the front$ indicates that matching characters must be on the last side* Match * Previous characters 0 times or

One, SMTP sends mail Here the Python script is to log 126 of SMTP to send mail to the QQ mailbox.QQ mailbox use is encrypted stmp, need to encrypt version of children's shoes please pay attention to the subsequent updates.TIPS: My local environment

One, socket programming (1) Introduction to Socket method Socket is an abstract concept of network programming. Usually we use a socket to indicate "open a network link", and opening a socket requires knowing the IP address and port number

The function of the adorner in many languages, the name is not the same, in fact it embodies a design pattern, emphasizing the open closure principle, more for later function upgrades rather than writing new code. Adorners can not only decorate

People often say that life is a process of making multiple-choice choices: Some people have no choice but one way to go; some people are better, they can choose one, some are good or the family is good, there are more choices, and some people in the

For a long time did not write flask code related, think also really ashamed, and eggs, this time or not write flask related, don't want to hit me ah (so cheap, have the ability to bite me ah This time I'm going to write a very important thing about

For multiplier in range (5,8): For I in Range (1,11): Print I, "x", multiplier, "=", i*multiplier print#I tried to align the 2nd for with the first for, but the program gave an error.I understand that if Lacy, it will represent the second block as a

Print (Sys.path) # printing environment VariablesPrint (SYS.ARGV) # Printing relative pathPrint (sys.argv[1]) # prints the corresponding parameters1. in python , sometimes the OS module is imported , which means that when interacting with the system,

First, the basic concept A lookup (searching) is a data element (or record) in a lookup table that has a keyword equal to a given value, based on a given value. Lookup table: A collection of data elements (or records) of the same type Keyword: The

The previous blog simply said the basic knowledge of the class, the following emphasis on some of the methods commonly used in the class. An obvious sign of the so-called magic method is that the method name is contained by the _ two underscore. (1)

Introduced The Fibonacci sequence, also known as the Golden Section, refers to a sequence of numbers 0, 1, 1, 2, 3, 5, 8, 13, and 、...... Mathematically, the Fibonacci sequence is defined in the following recursive way: F (0) =0,f (1) =1,f (n) =f

Python3 practice-get Data from the website (Carbon Market Data-GD) (bs4/Beautifulsoup), python3bs4   Based on your individual needs, you can obtain some data from a website and find that the webpage link is hidden. You need to view the code in the

How to obtain the list of class attributes in Python, and obtain class attributes in python Preface In my recent work, I have encountered a need to obtain a static attribute of the class, that is, there is a class Type, and I want to dynamically