Python

First, built-in functionsMathematical operationsABS (-5) # take absolute value, i.e. 5Round (2.6) # rounded rounding, which is 3.0Pow (2, 3) # equivalent to 2**3, if it is POW (2, 3, 5), equivalent to 2**3% 5CMP (2.3, 3.2) # Compare the size of two

Python Full stack developmentThe article lets you thoroughly understand the Python decorator principle, from this interview work no longer afraid.First, the decoration deviceAdorners make it possible to perform other additional functions before and

1 #-*-coding:utf-8-*-2 #simulate sending an email3 fromEmail.mime.textImportMimetext4 5 6FROM_ADDR ='[email protected]'7Password = input ('Passord:')8TO_ADDR ='[email protected]'9 TenSmtp_server ='mail.lingrui.com' One AContext ='provides gift

Grab the movie name and score, and sort (code ugly fried)1 ImportUrllib2 ImportRe3 fromBs4ImportBeautifulSoup4 defget (P):5t=06K=17N=18Book_score=[]9Book_a=[]Ten whiletP: One Print "getting page%d ..."%k AK=k+1

A variable is an area of computer memory in which variables can store values within a specified range, and values can be changed. Based on the data type of the variable, the interpreter allocates the specified memory and determines what data can be

From: http://www.cnblogs.com/btchenguang/archive/2012/02/03/2337112.htmldeffoo (): Sum=0 forIinchRange (10000): Sum+=I SumA=Bar () Sumb=Bar ()returnsumdefbar (): Sum=0 forIinchRange (100000): Sum+=Ireturnsumif __name__=="__main__": ImportCProfile#

After years of using Python, I stumbled upon features and features that we didn't know in the past. Some can be said to be very useful, but they are not fully utilized. With that in mind, I've edited some of the features of Python that you should

Spare time, in the home built a server, because the use of the cell broadband, IP bit dynamic allocation. Domain name resolution is a problem, my domain name is generally parked under the dnspod. Dnspod has the API to provide the modification, the

This example describes how Python uses Minidom to read and write XML. Share to everyone for your reference. The specific analysis is as follows: A python-provided XML support XML parsing methods for 2 industry standards-sax and DOM. SAX (Simple API

This article is an example of how Django accesses Sina Weibo oauth. Share to everyone for your reference. The specific analysis is as follows: The recent integration of the site and Sina Weibo, the idea is simple, is to link the content of the page

In addition to the keywords (keywords) and the built-in types and functions (builtins), Python provides more functionality through libraries (that is, modules). The Common libraries (modules) are as follows: 1) Python Runtime service * The

This article describes the Python implementation of the QQ group to automatically send messages to members of the method. Share to everyone for your reference. The implementation method is as follows: Principle: We need to get all the members of

Today, a small framework tratto for managing Cisco devices, written in Python, can be used to execute commands in bulk. There are 3 main files after download: systems.py defines the operating systems of a number of different devices and their

The example in this article describes how Python implements a way to traverse windows and output the caption of a window. Share to everyone for your reference. Specific as follows: This code allows Python to traverse the windows of all running

python string A string or series (string) is a string of characters consisting of numbers, letters, and underscores. Generally recorded as: s= "A1A2 An "(n>=0) It is the data type that represents the text in the programming language.The Python

Today, when I was writing a crawler, I had to turn pages and divide the page. The code is as follows: TotalCount = ' totalpage = Int (totalcount)/20Valueerror:invalid literal for int. () with base 10 error The same error on the web was

Dictionaries consist of pairs of keys and their corresponding values (which make key-value pairs an item), separated by a colon (:) between each key and its value, separated by commas (,), and the entire dictionary enclosed by a pair of curly braces.

One, deadlock Simply put, a deadlock is a resource that is called multiple times, and multiple callers fail to release the resource, which creates a deadlock, with examples that illustrate two common deadlock scenarios. 1. Iteration Deadlock The

Python built-in functions-number-related, python function number This article summarizes the built-in functions related to numbers. Numbers include int (), long (), float (), and complex (). These functions can be used to convert numeric types. At

Python learning diary (Week 4), python Week 4Set Data Type Use a line of code to describe #!/usr/bin/env pythons2={}s = {33,12,33,32121}for i in s: print(i)print(type(s))print(type(s2))s1=set()s1.add(11)s1.add(22)s1.add(33)print(s1) The running