Python

Copy Code code as follows: Import Sys Import Urllib From Urllib Import Request Import OS From BS4 import BeautifulSoup Class Dramaitem: def __init__ (self, num, title, URL): Self.num = num Self.title = Title Self.url = URL def __str_

Look at the following two Python programs, the code is exactly the same, but the results are different because the last line of return indentation is different Copy Code code as follows: def powersum (Power, *args): "Return" the sum of

In Python 2.6, print is not a function, but a keyword that is used in the following ways: Copy Code code as follows: Print 1, 2 print ' A ', ' B ' The results are as follows: A space is printed between the comma-separated items, which

Copy Code code as follows: #!/usr/bin/python #-*-coding:utf-8-*- From Pyqt4.qtgui Import *From Pyqt4.qtcore Import *From PYQT4.QT Import * Class Clabel (Qwidget):Signallabelpress = Pyqtsignal ()def __init__ (self,parent = None):Super

1. Create a folder Nester for module Nester, which contains: nester.py (module file): Copy Code code as follows: "" "This is the" nester.py "module, which provides a function called the print_lol (), function is to print list,

Copy Code code as follows: Import time def block (file,size=65536):While True:NB = file.read (size)If not NB:BreakYield NB def getlinecount (filename):with open (filename, "R", encoding= "Utf-8") as F:return sum (line.count ("\ n") for

Objects in object (OOP) are a very important point of knowledge that we can simply think of as data and a collection of methods for accessing and manipulating the data. After learning a function, we know that if you reuse code, why use a class

Test url:http://tieba.baidu.com/p/27141123322?pn=Begin 1End 4 Copy Code code as follows: Import String, Urllib2 def Baidu_tieba (url,begin_page,end_page):For I in range (Begin_page, end_page+1):sname = String.zfill (i,5) + '.

1. Previous methods You can use the OS.GETCWD () function of the OS module if you want to get the current directory where the program is running. If you want to obtain the directory location of the currently executing script, you need to use

Using Python to implement the Hanoi. With a graphical demo Copy Code code as follows: From time import sleep def disp_sym (num, sym):Print (Sym*num, end= ') #recusionDef Hanoi (A, B, C, N, Tray_num):if n = 1:Move_tray (A, c)Disp

Use the RE, urllib, threading multithreading crawl Tianya posts content, set the URL for the end of the end of the Earth post, set the file_name for the download file name Copy Code code as follows: #coding: Utf-8 Import

Brief introduction Tuple 1. Tuples are collections of data surrounded by parentheses "()", separated by "," by different members. Access through subscript 2. Immutable sequence, can be considered as immutable list, and the list is different: the

Python crawls a picture of a Web site and places it in a specified folder Copy Code code as follows: #-*-Coding=utf-8-*- Import Urllib2 Import Urllib Import socket Import OS Import re Def docment (): Print U ' put a file in a

If Windows installation is complete, you need to add ' \python27\scripts\ ' to the system environment variable Copy Code code as follows: # Coding=utf-8 Import OS Import Urllib2 Url= '

Recently a lot of code to share this problem, the topic is the use of object-oriented or functional programming, the following is the implementation of Python examples Copy Code code as follows: #!/usr/bin/python #encoding: UTF8 '''

Copy Code code as follows: #-*-Encoding:utf-8-*- ''' Created on 2014-4-24 @author: Leon Wong''' Import Urllib2Import UrllibImport reImport timeImport OSImport UUID #获取二级页面urldef findUrl2 (HTML):Re1 = R '

Use the interface provided by Http://tool.oschina.net/less to send requests for remote compilation.Then save the compiled less in a file with the same suffix as CSS.The first time you use Python, the code is patchwork. You need to add a thread to

List comprehension is useful for making lists (list) easier to generate. For example, the elements of a list variable are numbers, and if you need to multiply the value of each element by 2 and generate another list, here's an approach: Copy

Simple data types and assignments Variable does not need to be declared Python variables do not need to be declared, you can enter directly: Copy Code code as follows: >>>a = 10 Then you have a variable in the memory of a,

Before using the Python 2.7 version of Httplib to do interface testing, the running code is normal, Recently started using Python 3.3, and then look at the previous code, found that import httplib error: Unresolved import:httplib, Error when