Python

0. PrefaceRecently for some reason again learning flask Framework. Organize related content with blogs. The flask frame and apache+php are slightly different, and the JS and CSS files in the flask frame are stored in a relatively fixed

1. iteratorsIterators are a way to access the elements of a collection. An iterator object is accessed from the first element of the collection, knowing that all of the elements have been accessed and finished. Iterators can only move forward

Role:Basestring is a superclass (parent class) of STR and Unicode, and therefore cannot be invoked and instantiated, but can be used to determine whether an object is an instance of STR or Unicode, isinstance (obj, basestring) Equivalent to

1 #! Usr/bin/env python2 #-*-coding:utf-8-*-3 #Author Calmyan4 #Logging related functions5 ImportOs,logging,time6 fromConfImportConfig7 8 defLog_file_ ():#detects if a file exists9 ifOs.path.exists (config. User_erro):#Verify that the user

ObjectiveAfter we use the automation post, want to proceed to this post operation, then need to use parameters associated with, Post will have a post ID, get to this ID, continue to pass this post ID can beFirst, delete the draft box1. We have

In Python all objects, Python programs can be decomposed into modules, statements, expressions and objects. As shown below:1 program consists of modules2 module contains statements3 statement contains an expression4 expression creation and

Iteration:　　Iterator Protocol :1. An iterator protocol means that an object must provide a next method that either returns the next item in the iteration, or causes a Stopiteration exception to terminate the iteration (only backward cannot go

1. Exception Basics: In the programming process in order to increase the friendliness of the program when a bug is not usually displayed to the user error message, but the actual page of a hint Basic syntax: 1 try:2 PASS3 except Exception as E:

Python Send mail Get ready In Python, the main use of smtplib and email two modules, the following mainly on the two modules to explain You need to prepare at least two test mailboxes before you explain them, which you can send and

In the reptile process, some pages in the login before is forbidden to crawl, this time need to simulate landing, the following this article is mainly to introduce the use of Python crawler simulation of the method of login to the tutorial, the

HTTP protocol is one of the most important and basic protocols in the Internet, and our crawlers need to deal with HTTP protocol frequently. The following article is mainly about the introduction of Python crawler quick understanding of the HTTP

Python uses SMTP to send mail. The SMTP (Simple Mail Transfer Protocol) is simply the message Transfer Protocol, which is a set of rules for sending mail from the source address to the destination, and it controls the way the letters are

Python reads binary mnist and python binary mnist Training data Structure: [offset] [type] [value] [description] 0000 32 bit integer 0x00000803(2051) magic number 0004 32 bit integer 60000 number of images 0008

Python basics 2. python Basics Iii. Analysis of variables, objects and values 1. If you don't remember it, it will be finished. 1.1 remember: all data is an object 1.2 remember: all variables are references to data objects. 1.3 analysis:

Python Arithmetic Operators, python ArithmeticPython Arithmetic Operators Assume that variable a is 10 and variable B is 20: Operator Description Instance + Add-add two objects A + B output result 30 - Minus-

Python file operations, The file object is created using the open function. The operations on the file are divided into three steps: 1. open the file and obtain the file handle. 2. read/write file content through file handle 3. close the file. Note:

Day6 random Number Module, day6random random Number Module Random We often see Random verification codes of websites, which are generated by random numbers. Therefore, we need to know the random number module. How to generate a random number. Random

Python data type-string common operations, python Data Type This section describes common string operations and examples. 1. python string There are three methods to declare a string in python: adding single quotation marks, double quotation marks,

Python crawler learning notes for beginners (with notes) and python learning notes 1. Install the programming tool and enter the Programming Interface First, go to notepad notebook and press enter (win7). It will automatically open the editing page (

WTI website recruitment information crawling, visualization operations, and recruitment information Objective: To use Python to capture data on the internship website and analyze job information, and use Python for Visual Analysis Software: Python 3.