Python

Look at the code first:def foo (A, b =[]): b.append (a) print Bfoo (1) foo (2)As a result, imagine: >>> [1] [2] >>> is actually: >>> [1] [1, 2] >>> View official documents:

If you need to write a very very long string, it needs to span more than one line, then you can use three quotation marks instead of normal quotes.Print " " This is a very long string. It continues here. And it ' s not over yet. " Hello, world! "

/********************************************************************** Author:samson* date:09/19/2014* Test Platform:* Linux Ubuntu 3.2.0-58-generic-pae* GNU Bash, version 4.2.39*

Verification by code is the most reliable:Class Foo (object): def __init__ (self): print ' foo init ' def __new__ (Cls,*args,**kwargs): print ' foo New ' return object.__new__ (cls,*args,**kwargs) foo = foo () print

1. Definition The Python function is identified with the keyword defdef test (name):p rint ' Hello%s '% (name) name=raw_input (' Please input your name: ') test (name)    PS: In Python, blocks of code are identified in a tightened manner, so

When learning Python, the first program hello.py (below)Print ("Hello Welcome to Python World")Run the report error because the command line indicates that the Python interpreter has been run, note the command-line environment and the Python

In the learning process of reptiles, another knowledge point that you have to master is the regular expression. The crawler needs to crawl the things you need, then to filter the results of crawling, regular expressions play this role If you learn

By referring to other cattle articles and code, and then summing up according to their own understanding, the explanation has been added to the note, FYIMain Reference article:

The Python shell repeats the last command: alt+p2.3 List: Python's drudgery(1) List function(2) Assign a value to a list without jumping to a location where an element does not exist.(3) Delete element, Del name[1](4) Shard assignment, name[2:]=list

Queue-dequeWith the basics of the above section, of course you need to fully master all the methods in the previous section, because the methods in the previous section, in the following tutorialwill be used over and over again.If you do not

@[Deep python]__new__ and __init__ 12345678 class A(object):    def __init__(self):        print "init"    def __new__(cls,*args, **kwargs):        print "new %s"%cls        return object.__new__(cls, *args, **kwargs)A()

Basic concepts of Class (classes): Class: An expression that abstracts the common denominator of the same particular transaction, and the Python class is a callable object. There are methods, variables, and data structures defined in

The object architecture in the Python type class perspective requires constant learning, which we need to be aware of when we use it. Let's see how we can better use the Python type class. The following article hopes that we will have some gains.In

Before reading this blog for some time, which describes how the author uses Java to implement the famous foreign Music search tool Shazam basic functions. The article mentioned also leads me to a paper and another blog about Shazam. After reading it

Download svn checkout http://pysendfile.googlecode.com/svn/pysendfile-read-onlycd pysendfile-read-only/ python First setup.py buildpython setup.py Install svn checkout http://pyftpdlib.googlecode.com/svn/trunk/pyftpdlib-read-only CD

Daniel please skip, Novice can refer to, see the following code comments,Another problem, want to learn this language, the best English cow some, can go to the official website to see more useful library, Chinese information is not very full1 #Run

Locust is an open source load testing tool. Use Python code to define user behavior, or to simulate millions of users.Locust is a very simple to use, distributed, User load testing tool. Locust is primarily a load test for websites or other systems

There are two ways to create a dictionary, and an error occurs if an assignment such as in [26] appears.in [+]: s['name'] ='Alex'In []: s['Sex'] ='male'In [19]: sout[19]: {'name':'Alex','Sex':'male'}in []: s = {'name':'Alex','Sex':'male'}in [21st]:

Delete the list content in python. A little busy today a=['XXXX_game.sql', 'XXXX_game_sp.sql', 'XXXX_gamelog_sp.sql', 'XXXX_gamelog.sql']for i in a: if 'gamelog' in i: a.remove(i)print a['XXXX_game.sql', 'XXXX_game_sp.sql',

The method for processing specific URLs in URLconf in Django framework, djangourlconf Sometimes you have a mode to process a series of URLs in your URLconf, but sometimes you need to process a specific URL. In this case, use the linear processing