Python

Dict dictionary table belongs to the mapped data typeFeature: Access to data by key (key) instead of subscriptAn unordered collection containing arbitrary objectsVariable length, can be nested arbitrarilybelongs to the "Variable mapping"

Function basicsFunctions: Functions are well-organized, reusable, code snippets used to implement single, or associated functions.Functions can improve the modularity of the application, and the reuse of the code. Python provides a number of

First, the use of Pycharm1. Create a project2. Python adjust font size with Ctrl + mouse wheel scroll up and down3, Python new program auto-completion coding and environment4. Set a breakpoint (click the left mouse button after the line number in

1. View the class properties and methods of the import libraryPython has a bit of a feeling especially inconvenient is that, unlike C + +, when a type is specified, an instance of that type is called "." Intelligently prompts for the method or

The list is ordered and the elements can be modifiedTest = [11, 22, 33, 44, 55, 22]################################## The list of deleted elements ##################################### del test[1] Slice Delete# del Test[1:4] Delete test[1], test[2],

String:The creation of a string:Single quotes, double quotes, triple quotes The particularity of the string:Index tile join repeating member operator (in, not in)Common Methods for strings:1). Determine the type of string (IsDigit, Isspace,

Function-If you want to reuse the same or very similar functions, write a function.-function uses the DEF keyword declaration to return a value with the return keyworddef my_function(x, y, z=1.5): if z > 1: return z * (x + y) else:

I. Programming and programming languages The purpose of programming:The invention of the computer is to replace/liberate the human being by machine, and the purpose of programming is to pass the human thought process to the computer

#-*-coding:utf-8-*-#-*-AUTHOR:YJW-*-ImportTurtle fromTurtleImport*Setup (800,600) Color ("Yellow") FillColor ("Yellow") bgcolor ("Red")defMygoto (x, y): Up () goto (x, y) down ()defDRAWSTARFW (x): Begin_fill () forIinchRange (5): Forward (x) Right (1

1.break End LoopCount = 0while Count The result of this code is that it will only print once "Hello,jay". Since a break is encountered, the loop is ended, and the statements in the loop body are not executed.　　2.continue jump out of this cycle, in

In the course of learning Python, I believe that there are a lot of people like me, the Python decorator has been very confused, I have been puzzled for a long time, and through thinking and review to understand, I hope the following content will be

Let's talk about the shallow cognition of the Python programming language, "a programming lesson, that's all." This is my understanding of this technology a few months ago.Now, it's not just "that's it", and it's probably not as simple as it looks,

Share a Zip () function usage under Python today.Zip () is an intrinsic function of Python that takes a series of iterated objects as parameters, combining the corresponding elements in the object in order into a tuple, each of which contains

Common built-in functions Built-in functions: functions that are automatically triggered at a particular time within a class Example 1:setattr, GetAttr, delattr classPerson :#def __init__ (self, name): #self.name = name? def

Isinstance(object, classinfo) Object--instance objects. ClassInfo--can be either a direct or indirect class name, a base type, or a tuple with their constituent groups. >>>a = 2>>> isinstance (a,int) True>>> isinstance (a,str)

Background:I have a lot of log data, every log has a date string, and I need to convert it to a DateTime format.The problem is that there are a variety of string formats in these logs, with 2017-05-25t05:27:30.313292255z, 2016-07-01t00:00:00 and

Ternary OperationsTernary operations, also known as trinocular operations, are shorthand for simple conditional statements:Simple Conditional statement:if condition established: val=1else: val=2Change to ternary operation;file ProcessingNow

Count the english words of english article, # -*- coding: utf-8 -*-import string def extend_word(text): if text.find('\'') > 0: old2new = dict() words = text.split() for word in words: if word.find('\'') > 0:

Describes how to organize the progress bar of the console in Python. This article describes how to display the progress bar in Python. It is a very practical technique in Python programming. Share it with you for your reference. The specific method

Sesame HTTP: Installation of RedisDump and sesame httpredisdump RedisDump is a tool used for Redis data import/export. It is implemented based on Ruby. To install RedisDump, you must first install Ruby.1. Related Links GitHub: