Python

#!/usr/bin/python#-*-Coding:utf-8-*-########################################################################## File Name:addreplace.py# Author:yuhaitao# Mail: [email protected]# Created Time:fri 07:05:13 PM PDT########################################

1.flask Four steps to connect to the database: Pour into third-party database expansion pack: from Flask_sqlalchemy import SQLAlchemy Configure the Config property to connect to the database:app.config["Sqlalchemy_database_uri"] =

Causes of sticky packs:Continuous send multiple small data, there will be sticky phenomenon, which is caused by the TCP protocol optimization algorithmWhen a data is sent that exceeds the maximum range of this receive, the remaining data is left to

Import requestsImport JSON#发送get请求并得到结果# URL = ' http://api.nnzhp.cn/api/user/stu_info?stu_name= little black Horse ' #请求接口# req = requests.get (URL) #发送请求# print (req.text) #获取请求, get the JSON format# Print (Req.json ()) #获取请求, get the dictionary

Topics discussed in this chapterHow Python calculates adorner syntaxHow Python determines if a variable is not local (by assigning a value to a variable inside a function to determine if it is a local variable)Reasons for closures and how they work (

1 stacksA heap is a binary tree in which the value of each parent node is less than or equal to the value of all its child nodes, and the smallest element is always in the root node of the binary tree.Creation of HeapsImport HEAPQ Import = range (

Source: http://blog.csdn.net/chroming/article/details/520833871. pyThe script file is the most basic source code extension. A direct double-click Run under Windows invokes Python.exe execution.2, PYcWhen you execute Python code, you will often see

Beginner python, and C + + is still a lot different. Direct assignment, shallow copy, and deep copy, there are still a number of differences between the operations of these three copy objects. The Python language version is 2.7 and is tested in

Character encodingBecause a computer can only handle numbers, if you are working with text, you must convert the text to a number before processing it. The oldest computer was designed with 8 bits (bit) as a byte (byte), so a single word

Https://www.cnblogs.com/wongbingming/p/6848701.htmlIt replaces% with {} and:.By locationIn [1]: ' {0},{1} '. Format (' Kzc ', +) out[1]: ' kzc,18 ' in [2]: ' {},{} '. Format (' Kzc ', +) out[2]: ' kzc,18 ' in [3]: ' {1},{0},{1} '. Format (' Kzc ',

Overview An adorner is essentially a Python function that allows other functions to add extra functionality without any code changes, and the return value of the adorner is also a function object. We need a decorator that can test the

1 selectionIf elif ElseNote that the following are:if age>18: print'adult'elif age>6: Print ' teenager ' Else : Print ' Kid '2 Cycles1) for x in XX:names = ['Michael'Bob'Tracy ' ] for in names: Print name2) while XX:sum == while n > 0:

The module provides a convenient way to the operating systemOs.environ: Returns the system environment variable OS.GETENV (ENV): Returns the value of the environment variable env os.getpid (): The process of the current program Os.uname (): Returns

1 " ". In Python, this side loop computes the mechanism, called the generator: Generator. 2 There are a number of ways to create a generator. 3 you can get the next return value for generator with the next () function" "4 5 deffib (max):6N, a, b = 0,

This is the content of the December plan, beginning in January 2018 ~If there is any mistake, please ask for it ~Letter Manipulationstr.capitalize()Returns a copy of the string with the first character capitalized and the remaining characters

1.name = "Alex"Print (ID (name))Li = [a]Print (ID (LI))2.is determines the memory addressName1 ="[email protected]"name2="[email protected]"Print(name1 = =name2)Print(name1 isname2)in Pycharm, 2 of the results are true .in the Python small black box,

Get Request:Usage Scenario: If you only get data for the server and do not have any impact on the server, then use a GET request at this time . parameter:The Get request is placed in the URL , and is passed '? ' To specify key and value in the form

1. Required librariesXLRD: File ReadXlwt:xls Excel TableExcel tables in OPENPYXL:XLSX format2 functions to be used, objectsWorkbooks:excel File Object1. New Workbook ()2. OpenLoad_workbook ("File path + name. xlsx")Sheets:sheet Page Object1.

Python DayDayUp series-string operation (1), pythondayup This document describes several common string methods. One String method: upper (), lower (), isupper (), islower () The upper () and lower () Methods return a new string. The letters of the

Python extension library 2-matplotlib, pythonmatplotlib 1 load the matplotli drawing module and rename it to plt import matplotlib.pyplot as plt 2 line chart Import matplotlib. pyplot as pltimport numpy as npx = np. arange (9) y = np. sin (x) z =