Python

First, URL reverse resolutionBefore we formally introduce the reverse parsing, let's start by introducing the URL parameter in Django, which is our URL instance, where the name parameter is its alias, which is the argument that we'll rely on in the

Variable data types: list, Dict, set (modifiable elements)Immutable data types: str, tupleFocus: STR, list, dictList-derived exercises:# Use list derivation: Find all the odd numbers within 100 and multiply all the odd numbers by 3 to write to the

The string also has an encoding problem. because 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

Adding and traversing Python dictionary key-value pairsTo add a key-value pairFirst define an empty dictionarydic={}1Assign a value directly to a key that does not exist in the dictionary to adddic[' name ']= ' Zhangsan 'Dic{' name ': ' Zhangsan '}12

Records the interface of Cisco devices using a Python script.#!/usr/bin/env pythonimport paramikoimport sysimport time class ciscoswitch ():          def __init__ (Self,host,username,password):                    self.username  = username           

First, the collectionIts elements are unique and unordered.1. Set definitions = Set ()s = {1, 2, 3}2, the method of the collectionThe set operation of the update version is modified on the original collection and the return value is none.

Python Overview:Version: 1.python2 versionpython2.3python2.72.pyhton3 versionpython3.5python3.7 (Latest Version)Python2 version Python3 version incompatible (not backwards compatible)Python pros and Cons: 1. Easy to learn and use2. High development

# 1, Mock interface# import Flask #python的轻量级的开发框架# # interface, development of backend services# # in the browser run Http://127.0.0.1:8080/get_user, or other way to access the interface# server = Flask. Flask (__name__) #__name__当前文件名, take our

Through the Difflib module to achieve differences in file content, it is the standard library module python, does not need to be installed separately, the role is to compare the differences between files. and the output HTML document is supported,

Configparser module is a python from the file to get the fixed format parameters of the module, because it is python only, we should use a lot of, I think this parameter module is more flexible, add parameters, modify parameters, read parameters,

Python code:"""Bubble Sort (4) in the unsorted number, by 22 comparison [transposition], the smallest number to the first n number of orders, you need to execute the N-1 wheel, the 1th round of N-1 times, the subsequent round than the previous round

Configparser module: for creating profiles in a certain formatCreateImportConfigparserconfig=Configparser. Configparser () config['DEFAULT'] = {'default':'Yes'}config['Path'] = {'UserInfo': R'E:\pycharm\ Learning \day29\userinfo'}with Open

There are special methods in Python that start with a double underscore and end with a double underline. As __getitem__, these methods are special methods that are used internally by the Python interpretation authority and generally do not need to

Subprocess Module允许你生成一个或多个进程，并且可以跟它交互，并且获取返回的结果，这个模块想要替换掉几个老的方法： os.system os.spawn* 所以以后跟系统交互的命令，尽量用subprocess建议调用subprocess的run()方法去跟系统进行调用，更高级的方法，使用popen()

Logging module很多程序都有记录日志的需求，并且日志中包含的信息即有正常的程序访问日志，还可能有错误、警告等信息输出，python的logging模块提供了标准的日志接口，你可以通过它存储各种格式的日志，logging的日志可以分为：5个级别 debug() info() warning() error() critical()对于级别： notset 0

Python learning diary 3 variable 2, logical judgment, for loop, python variable Review the questions that occur when you write a quiz code. The condition in the While statement. It should be when result = false and answer = input. If answer = input (

Example of special wave effects for implementing the PS filter function in Python, python Filter This article describes how to implement the PS filter function in Python. We will share this with you for your reference. The details are as

Let's also talk about object-oriented and class, and also about object-oriented There is no long story here, and only pseudo code is here Today I want to cook, stir-fry two dishes, one is fried tomato with eggs and the other is fried cucumber with

Day03 -- Python function, day03python Function Definition and use 1. Syntax Def function name (parameter):... function body... return value Functions are defined as follows: Def: indicates the function keyword.Function Name: name of the function.

Day2 course summary, day2 Summary I. 1. Historical Origins and conversion relationships of computer coding: The computer code is carried out in binary code 0101, with ascii code0000000101000001 01000010 01000011 abc ascii code is based on ascii