Python

1. Conditional judgmentage = 3if age >= 18: print(‘adult‘)elif age >= 6: print(‘teenager‘)else: print(‘kid‘)Elif is an else if abbreviation and can have more than one elif.2. CycleThere are two types of Python loops,One is the for...in loop,

Program 2: Modify the Haproxy configuration fileDemand:11, check2 Input: www.oldboy.org3 get all records under the current backend4 52, New6 Input:7arg = {8 'Bakend':'www.oldboy.org',9 'Record':{Ten 'Server':'1

A dictionary is another mutable container model and can store any type of object.Each key value of the dictionary (key=>value) pairs with a colon (:) split, each pair is separated by a comma (,), and the entire dictionary is enclosed in curly braces

@property is an adorner, supported by the Python native library, without importThe function of @property is to turn a function into a property, generally acting on a member function within a class.First put a code to describe the meaning of the

Directory: Python language Features 1 function parameter passing of Python 2 meta-classes in Python (metaclass) 3 @staticmethod and @classmethod 4 class variables and instance variables 5 python

Hashlib Module For cryptographic related operations, instead of the MD5 module and the SHA module Mainly provides SHA1, SHA224, SHA256, SHA384, SHA512, MD5 algorithm # MD5 Obsolete Import Md5hash = Md5.new () hash.update (' admin ')

For the first time, we take the blog park as an example.Cnblog is a typical static Web page, by looking at the source code of the blog post, you can see very little JS code, even the CSS code is relatively simple, very suitable for beginners to

Requests is a simple and easy-to-use HTTP library implemented by Python, which is much simpler than urllib.Because it is a third-party library, CMD installation is required before usePIP Install requestsOnce the installation is complete, import it,

Python string operations commonly used operations, such as string substitution, deletion, interception, copying, connection, comparison, search, segmentation, etc., the need for friends can refer to.1. Remove spacesStr.strip (): Deletes the

Python2 and Python3 in a little bit different, but for programming is not too big difference, in the release notes, Python2 official support until 2020, so when learning to use Python3 version: 1, the difference between print,    In Python2, you can

When using array, the operator * is used to calculate the quantity product (point multiplication), and the function dot () is used to calculate the cross product (cross-multiply).When using matrix, the operator * is used to calculate cross product,

Import reImport Urllib.requestFrom docx import DocumentHeader= ("User-agent", ' user-agent:mozilla/5.0 (Windows NT 10.0; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/55.0.2883.87 safari/537.36 ')Opn=urllib.request.build_opener

Basic conceptsFunctional programming is a highly abstract programming paradigm, and functions written in purely functional programming languages have no variables. Therefore, any function, as long as the input is determined, the output is determined

#!/usr/bin/env python#-*-Coding:utf-8-*-# @Time: 2017/11/21 18:48# @Author: mixiu26class Role (object):n=123 # class variablesdef __init__ (self,name,role,weapon,life_value = 100,money = 15000):# Execute __init () __ method before class execution# __

steganography (steganography): A technique and science for information hiding, that is, not letting anyone outside of the program know the delivery event of information (not just the content of the information)1, randomly looking for two pictures2,

Try: Raise Nameerror (' wrong ')Except Nameerror as E: Print (e)Common ExceptionsAttributeerror attempts to access a tree that does not have an object, such as foo.x, but Foo has no attribute xIOError input/output exception; Basically, the

Car classclassCar ():" "Car Simulator" " def __init__(self,name,model,year):" "Initialize the properties of the car" "Self.name=name Self.model=Model Self.year= YeardefGet_describe_car (self):" "return descriptive information" "Long_name= str

Import reImport Urllib.requestImport Urllib.errorUrl= "Http://blog.csdn.net"Header= ("User-agent", ' user-agent:mozilla/5.0 (Windows NT 10.0; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/55.0.2883.87 safari/537.36

Beautiful Soup is a python library that extracts data from HTML or XML files. It is able to use your favorite converter to achieve idiomatic document navigation, find, modify the way the document. a person has at least one dream, there is a reason

Start with python and start with python 1. tranceback is a record 2. print (name. title () uppercase letters Print (name. upper () Capital Print (name. lower () lower case Print ("Hello," + full_name.title () + "! ") Splicing Print ("language: \ n \