Python

Turtle Drawing VillainImport Turtleturtle.setup (700,700,100,100) #setup () Set the form size, the latter two parameters are optional, and the function is not required for the Turtle.speed (Ten) #设置画笔移到速度, the parameter value is 0-10, The larger the

1, List turn strSuppose you have a list named Test_list, and the converted Str is named TEST_STRThe conversion method:Test_str = "". Join (Test_list)Example:It is important to note that this method requires that the element in the list be of

Python Basics-Functional programmingHigher order functions: Map, reduce, filter,sortedAnonymous functions: Lambda 1.1 Functional ProgrammingProcess-oriented programming: we can break down complex tasks into simple tasks by splitting large pieces of

One, NumPy: Array calculation1. NumPy is a basic package for high performance scientific computing and data analysis. It is the basis of various other tools such as pandas.2, the main functions of NumPy:# Ndarray, a multidimensional array structure,

The second problem: calculating all the numbers in a string and1. Only lowercase letters and numbers in a string2. Numbers may or may not be contiguous3. Sequential numbers are treated as a numbers= ' 1234adg3g11 'S1 = ""For I in S: If I.isdigit ()

The source of this article: https://www.cnblogs.com/goodhacker/p/3355660.html#undefinedThe log system in the Python standard library is supported from Python2.3. As long as import logging This module can be used. If you want to develop a log system,

The table above has been ordered by the number of lines of code. The interesting point is that the top 4 of the code, except for the CPython of the other three are all operations of the nature of the project, originally I guess the code should be a

First to do a self-introduction, I 13 admitted to a very rotten specialized private school, the study is the biological profession, the specific school name I will not say out caught dead. I dropped out of school in 13, I was in such a college, a

1 #Conding=utf-82 ImportSYS3 defFun (char,num):4 """5 @author: Chengdu-Jason qq:9172070116 :p Aram Char:str (char)7 :p Aram Num:int (num)8 : return:9 char = str (char)Ten num = int (num) One Rowlen = num A For i in range (num): - output = ' *

1. OS module: Provides an interface for invoking the operating systemOS.GETCWD ()   Gets the current working directory, which is the directory path of the current Python script work os.chdir ("DirName")    changes the current script working

　　　　　　　　The step of the functionorder : position parameter, dynamic receive location parameter *-> default value, dynamic receive keyword parameter * *position parameter->*args-> default parameter value->**kwargsI. Function parameters--Dynamic

Content: JSON module Collection operations Function One, the JSON moduleJSON (JavaScript Object Notation) is a lightweight data interchange format. It is based on a subset of ECMAScript.The JSON module can be used to encode

When logging with Python's logging module, I encountered the problem of duplicate logging, the first record was written once, the second record was written two times, and the third record was written three times. It's a headache, but it's not a

Supports common mainstream platforms such as AIX, HPUX, Solaris, Linux, Windows, etc., UNIX, Linux platforms that are common except for Windows, have native Python, but generally have a lower version. As for cross-platform and his cross-platform

1, HTTP Introduction:HTTP (Hypertext Transfer Protocol) is a stateless, application-level protocol based on request-response mode2, the URL detailed:Baidu search for a URL address:Https://www.baidu.com/s?wd=%E4%B8%8A%E6%B5%B7%E6%82%A0%E6%82%A0%E5%8D%

1. What is NumPy?Very simply, NumPy is a scientific computing library of Python that provides the functionality of matrix operations, which are generally used in conjunction with SCIPY and Matplotlib. In fact, the list already provides a matrix-like

First, install PythonNow Python has two larger version one is python3.x one is python2.x,python3.x equivalent to python2.x is a relatively large upgrade, but python3.x is not backward compatible, so some original python2.x version of the code can

Dict (dictionary)Python built-in dictionary: dict support, Dict full name dictionary, in other languages also known as map, using key-value (Key-value) storage, with a very fast search speed.Compared with list, Dict has the following features:

I. Loops and Branches1. Conditional branching statementsIf condition:code blockElsecode block2. While of the Loop statementThink 1: Find the value of 1+2+3+....+10　　sum =1 while num :+ = num + = 1print(sum)For loopFor statement:code

1 ImportSys,time2 #Import Module3 4 forIinchRange (50):5 #the length of the progress bar6Sys.stdout.write ("#")7 #the contents of the progress bar, it is important to note that Pycharm may not show the method of write8 Sys.stdout.flush ()9 #Refresh