Python

File processingF=open (' file ',' R ') to open a fileF.close () close file, equivalent to save1. character encoding In the process of file processing, first there is an important concept, is the character encodingCharacter encoding: Compiling human

Class A (object): def test_func (self): print (' From A ') class B (A): Pass # def test_func (self): # print ("From B") class C (A): Pass # def test_func (self): # print ("from C") #多继承, 2.7 and 3.0 is a bit

There is a excle table to do some filtering and then write to the database, but the date type of the cell is taken out is a number, so query the next solution.The main code structuredata = Xlrd.open_workbook (excel_path) Table = data.sheet_by_index (

This article was translated from official documentation: Regular Expression HOWTOArticle: python--(1)Full text download: Python is a basic form of expression======================================================================================3.

First, the author introducesWu Haidong: My blog:http://www.cnblogs.com/whd-67270Ii. Description of the procedure1. Check the employee's salary2. Revise employee's salary3. Add new Employee Records4. ExitThree, pre-procedure preparationCreate a file

Some of the most common and common time formats1, timestamp (timestamp), the timestamp represents the offset that is calculated in seconds, starting January 1, 1970 00:00:00.2, Time tuple (struct_time), a total of nine element groups.3. Format time,

1. Add--append, Extend, insertList.append (item) ———————— Add an entry to the end of the listList.extend (Iterative object) —————— expansion list to increase list, string, tuple, etc.a=[1,3]in[]: a.append (5) in[[]: aout[]: [1, 3, 5]b=[5,6,7]in[

Exercise 11: Asking questionsI've had a lot of print-related exercises to get you used to writing simple things, but simple things are a little boring and now it's time to keep up. All we have to do now is read the data into your program. This may

#Coding=utf-8ImportOSImportUrllibImportUrllib2ImportRe fromBs4ImportBeautifulSoup#download using the Urllib.urlretrieve () function. Very convenientImportSocket#Timeout periodSocket.setdefaulttimeout (5)#an empty folderBasedir=r"E:\spring". Decode ('

Requirements: Crawl all the topics of the Watercress Group (topic title, content, author, release time), and reply (best reply, normal reply, Reply _ reply, page back, 0 replies.)Solution: 1. First crawl under the group, all the topic links, through

http://blog.csdn.net/churximi/article/details/51043595Method 1: Custom Exceptions #-*-coding:utf-8-*- """function: Python jumps out of the loop""" #Method 1: Custom Exceptions classGetoutofloop (Exception):Pass

ConceptIn general, copying an object is not a new memory space, but the new object name points to the original memory address, this operation is not a copy, but a new reference. Placing the new object in the new memory space is the copy. In Python,

Python Network data collection 3-data stored in CSV and MySQL Warm up first and download all the pictures from a page. Import requestsfrom BS4 Import beautifulsoupheaders = {' user-agent ': ' mozilla/5.0 (Windows NT 10.0; Win64; x64) applewebkit/537.

Simple use of beautifulsoup and selenium Review of Requests Library Long requests time useless, because in a moment to write a simple crawler, so or casually write a little review under. Import REQUESTSR = Requests.get (' Https://api.github.com/user

In addition to the while statement just described, Python draws on other process control statements from other languages and makes corresponding changes. A detailed description of the process Control statements in Python 4.1 if Statements Perhaps

[Life Bitter short Python song] -- Python functional programming 01, python01 People who have some knowledge about Python should know that Python is not a functional programming language, but a language that supports multiple paradigms, which also

Implementation of the pygame genie walking and two-step jump I have to admit that PythonGame programmingThe translation and layout of this book is very bad, but the demo in it is still very good. I have made some adaptations here. First,

Record the MySQL implementation in python that imports data from a txt file at a time, Environment: python2.7 ComsenzXP comes with MySQL Install the python-MySQL Module Data format: account information in txt format. One row of data. Difficulty:

Day4 job code exercises, day4 job code exercises Logon module: Regardless of the website, we often encounter this situation. Let's log on to this website. The flowchart is as follows: 　　 Ideas: 1. when we log on to the website, we first enter the

A complete automated login test-, automated- # Coding = UTF-8'''Created on 2017-7-4@ Auther: QigegeProject: logon test case'''Import unittestFrom selenium import webdriverFrom selenium. webdriver. firefox. firefox_binary import FirefoxBinaryImport