Python

Way One:Ubuntu just installed the command Line Input command is not automatic completion, you can make the following changes to add command line command auto-completion function.Modify the /etc/bash.bashrc file if [-f/usr/share/bash-completion/bash_

Definition of a functiondef square_sum (A+b)c = a**2+b**2Print Cfunction is to find the sum of squares of two numbersReturn can return multiple values, which is equivalent to returning a tupleReturn A,b,cIn Python, when the program executes to

Variables do not need to be declared>>>a = 10>>>print A>>>print type (a)Ten Reclaim variable names>>>a = 1.3>>>print A,type (a)1.3 Basic data Typesa=10 # int Integera=1.3 # float Floating pointA=true # Truth (true/false)A= ' hello! ' # stringThese

Sequence sequenceA sequence is a set of sequential elementsThere are two types of sequences: tuple (fixed value table; also translated as tuple) and List (table)>>>S1 = (2, 1.3, ' love ', 5.6, 9,, False) # S1 is a tuple>>>S2 = [True, 5, ' smile '] #

What is the difference between the progress bar and the general print?The answer is that print will output a \ n, a newline character, so that the cursor moves to the beginning of the next line, then the output, something that was previously output

1. Create a class　　1 class Book (object): 2 def __init__ (self,b): #定义构造器 3 self.name=b4 print Self.name5 def UpdateName (self,a):6 self.name= A7 print self.nameAttention: __init__ () is called

Any Python program can be imported as a module, and you need to add a path when importing your own modules:Import SysSys.path.append (' Absolute-path ');(__pycache__ is created when executing main.py)hello.py content:

Read the notes of Wang Chunye predecessors, and encountered a very pit case.A namespace is a mapping from names to objects>>> Class A:def __cmp__ (Self,other):If other > 0:print ' other > 0 '; return-1Elif Other Else:print ' other==0 '; return 0>>>>>

1. Specific connection process I'm not going to say it. See also: http://woodpecker.org.cn/2. Use the server-side and client-side communication examples to illustrate3. On the CodeService side (server.py)1 #-*-coding:utf-8-*-2 ImportSocket3host="127.

Resources__setattr__, __getattr__, and __delattr__ and __getattribute__ can intercept access to object properties;>>> s = Something ()>>> S.age = 3Set ' age ' = 3>>> S.age3Notice that S.age does not call __getattr__ because the __getattr__ method is

This post demonstrates how to use try clause to handle the exceptionsdef test_exception (case=none):p rint casetry:if case is none:raise valueerror ("There are no value") elif case = = 1:raise Impo Rterror ("Can not import the module") else:raise

1. Successful installation of Wxpython2, the first small graphical interface applet-Create and display a Web small frameworkReference http://www.cnblogs.com/fnng/archive/2013/05/23/3094033.html#! /usr/bin/env python#coding =utf-8Import WXApp=wx. APP

" " Date: September 5-September 30 Requirements: 1. Summary of the book contents, finishing in the blog Park notes upload 2. After all the exercises in the course Note: "#" After the addition of the notes (42 pages per day, you can guarantee to read

(Basic Python tutorial) learning notes | Chapter 2 | dictionary Chapter 2: dictionary when indexing is poor The unique built-in ing type in Python is unordered, but all are stored in a specific key. The key can be used as a character, number, or

Compared with list and str of Python, pythonstr Similarities All data belongs to the sequence type The so-called sequence data means that each element of a sequence can be obtained by specifying a number and the line is called an offset. To get

Python threading multi-thread programming example, threading multi-thread programming Python multithreading can be implemented in two ways: Functions and threads 1. Functions Call the start_new_thread () function in the thread module to create a

Python scripts are used to analyze dns logs and rank the domain names interviewed. Some time ago, I had a requirement to check the top domain name access times on the dns for a period of time. I had to resolve the dns logs slowly and I learned

Python processes PHP array text files, Requirements: Process a configuration file and splice the available characters. The following is the original text. We want to get this result,Copy codeThe Code is as follows:Redis-h 127.0.0.1-p 6379 | select

Summary of several methods for executing shell commands in python, pythonshell A recent requirement is to execute shell commands on the page. The first thing that comes to mind is OS. system,Copy codeThe Code is as follows:OS. system

Python has multiple methods for removing list duplicates. I encountered a problem today. I used the itertools. groupby function at my colleague's prompt. However, this is useless. The problem is to de-duplicate the news id in a list. After