Python

==================================#!/usr/bin/python#-*-Coding:utf-8-*-Import MySQLdb# Open Database connectiondb = MySQLdb.connect ("localhost", "testuser", "test123", "TESTDB", charset= ' UTF8 ')# get an action cursor using the cursor ()

Python implementation based on co-discovery of the relationship between charactersReference Links:To extract the "Busan line" character Relations,Draw a beautiful network Diagram with Python's networkx1. Co-existing relationshipIn the literature

http://my.oschina.net/jiemachina/blog/189460Note that the replacement of these emoji is the standard expression characters, each expression is originally 2 bytes, replaced by a string, each expression becomes 12 characters, wasted a lot of space,

Most of the content of this article is reproduced to: official website of Liao Xuefeng1. Modules (module)In the development of computer programs, as the program code more and more, in a file code will be more and more long, more and more difficult

Import timeOne, time acquisition functionTime (), CTime (), Gmtime ()>>> Import Time>>> Time. Time()1524297783.3058376>>> Time. CTime ()'Sat Apr 16:03:09 2018'>>> Time. Gmtime () Time. Struct_time (tm_year=2018, tm_mon=4, tm_mday= +, tm_hour=8,

Record the usage of the SYS module and look at things that are easy to forget, but easily forgotten.One, sys module1, the common use method2. How to import python files from other modules3. Import the Python module in the same directory4. Two ways

#coding =utf-8Import OSImport timeFile_atime=int (Os.path.getatime (' D:\\a.txt '))Print "File_atime:", File_atimeTime_arr=time.localtime (File_atime)print ' Time_arr: ', Time_arrPrint "Regular time:", Time.strftime ('%y-%m-%d%h:%m:%s ', Time_arr)C:\

Data typeIn reality, according to the different performance of things, and then can be the corresponding classification. For example, when shopping in the supermarket, the supermarket will be based on the productDifferent characteristics of the

What kind of language is 1.Python?Python is a very advanced language, and it contains a very rich library. Using Python can greatly improve the productivity of a programmer, because to complete a project, you do not need to start from the

JSON strings are recognized by any language, so the JSON module is an important module.The JSON string is actually a string.1. JSON formatThe JSON format is as follows, and you must use double quotes.2. Read the JSON fileAfter the JSON file is read,

Two modules for serialization JSON, used to convert between string and Python data types Pickle for conversion between Python-specific types and Python data types The JSON module provides four functions: dumps, dump, loads, loadThe

One, the operation of the fileFile handle = open (' File path + filename ', ' mode ')Examplef = open ("Test.txt", "r", encoding = "Utf-8")　　Analysis: Because Python files and test.txt files are in the same folder, you do not need to write the

DescribeThe function that corresponds to the Classmethod modifier does not need to be instantiated, does not require the self parameter, but the first parameter needs to be a CLS parameter that represents its own class, can invoke the class's

F12:Right-click to select Copy PathIn the Selenium+python Automated Test (i) – Environment setup, a test script was run with the following script:from selenium import webdriverimport timedriver =

This is a text to Speech python module.1. There was a problem with MacOS installation:Later found,,, Foundation AppKit PyObjCTools are not present, the main reason is the lack of dependent modules pyobjc , after the installation of all normal.2.

Lists List数组可以管理多个数据 必须相同的类型python本质没有数据类型 管理一组数据就得使用列表• Create a list1. Create a general listl=[' Zhang3 ', ' li4 ', ' wang5 ']l2=[1,2,3,4,5]2. Create a hybrid list:l3=[1,2, ' hehe ', 3, ' Xiaohei '3. Create an empty list:L4=[]查看列表的长度len（列表）• Add

Before I speak the Python decorator, I would like to give an example, although a bit dirty, but with the decorator this topic is very appropriate.Everyone has underwear main function is used to modesty, but in the winter it can not wind and cold for

Chapter ContentPython object-oriented polymorphism and inheritance comparisons=========================================In OOP programming, when we define a class, we can inherit from an existing class, and the new class is called a subclass

#python Str.format method is used to format the output of a string.# ". Format ()Print (' {0}+{1}={2} '. Format (+/-))#1 +2=3 The numbers in curly braces in the visible string correspond to several parameters of format.Print (' {}+{}={} '. Format (+/

This is a very common base library when we use the Python language for machine learning programming. This article is for the Python machine Learning Library NumPy Introductory tutorial, interested friends to learn together NumPy is a