Python

1 #Coding=utf-82 ImportCopy3a=[1,2,'a','AB',['C','D']]4B=a#just to pass the quote5 6C=copy.copy (a)#Copy7D=copy.deepcopy (a)#deepcopy8 9A.append ('F')TenA[4].append ('m') One A Print 'A:', a - Print 'B:', b - Print 'C:', C the Print 'D:'D1Python 2.7

You can press the shortcut key CTRL + N in the Python shell to create a new *.py script, save it,The Run→run module on the file is executed, and the results are displayed in the Python shell,or type the name or Python name directly under your

Recently, I've been working on a comma problem with python, and I haven't figured it out today.1. Use of commas in parameter passing:This is not much to say that there is nothing to be confused about when a parameter or argument is passed the comma

Reprint: http://bbs.pinggu.org/thread-3078817-1-1.htmlSome people say that the difference between Python and R is obvious, because R is statistical, Python is designed for programmers, in fact, this is somewhat unfair to python. In the 2012 we said

Socket () function:Use the Socket.socket () function to create a socket:Socket (socket_family,socket_type,protocol=0)Socket_familu can be af_inet or af_unix.socket_type can be sock_stream (connection-oriented) or SOCK_DGRAM (for non-connected).For

1, installation BS4I use the ubuntu14.4, just use the Apt-get command.sudo Install Python-bs42. Install the parserBeautiful soup supports the HTML parser in the Python standard library and also supports some third-party parsers, one of which is lxml.

First, the preparatory workInstall python,installed version:2.7.9 in Window.Install PIP (optional)650) this.width=650; "style=" float:left;width:500px;height:185px; "src=" http://s3.51cto.com/wyfs02/M02/5D/B1/ Wkiol1ujzdvwc2dfaagnaruoxa4333.jpg

In this section, we will mainly learn about the three built-in functions for list: filter (), map (), and reduce (). 1.filter (function, sequence) takes one element from the sequence, passes in the function, and returns a sequence that makes

Original address: http://geek.csdn.net/news/detail/29735IntroducedCurrent formatters for Python, such as AUTOPEP8 and pep8ify, are used to remove lint errors in the code. This has obvious limitations.YAPF uses a different approach, based on the

Meta-grouptuples and lists are very similar. Tuples are different from lists. The tuple uses parentheses and the list is square brackets. And tuples are immutable types. 1 Creating tuples and assigning values2 Accessing the value of a tupleAn

Sometimes it is necessary to use Python to process binary data, for example, access to files, socket operation. At this point, you can use the Python struct module to do this. Structs can be used to manipulate structures in C.The three most

Python Module Module definitionAs programs become larger, they need to be separated into several files, and functions, classes, and variables can be reused in different files, rather than copying code. To meet these needs, Python provides

#/bin/env python#-*-coding:utf=8-*-ImportOs,time,subprocess,shlexImportUrllib2defUpload_yeelink (Image_name, log_file):#upload URL of your own deviceURL ='Http://api.yeelink.net/v1.0/device/XXX/sensor/XXXX/photos'length=os.path.getsize (image_name)

There is only one judgment statement in Python, which is if. else..There are three common types of these:1. Only if, no elseIf judging condition:EXECUTE statement2. If there is another elseIf judging condition:EXECUTE statementElseEXECUTE statement3.

Common string methods Method Description Capitalize () Returns an uppercase copy of the first letter Find (s) Returns the index of the first occurrence of the parameter S in the

Server side:# coding:gb2312#socket Server Side#获取socket构造及常量From socket Import *# ' on behalf of server ' localhost 'MyHost = ' '#在一个非保留端口号上进行监听MyPort = 50007#设置一个TCP Socket ObjectSockobj = socket (af_inet, SOCK_STREAM)#绑定它至端口号Sockobj.bind ((MyHost,

How does python generate XML files with DOM modules?Main method Three points:First, generate XML nodes (node)CreateElement ("Node_name")Then, add the attribute value to the node (Attribute)Node.setattribute ("Att_name", "Arr_value")Finally, the tag

1.os.popen running the Shell List commanddef traverseDirByShell(path): forin os.popen(‘ls ‘ + path): print f.strip()2. Using the Glob moduleGlob.glob (path) returns the file name with the directory. Wildcard characters are similar to

Python uuid module instance, pythonuuid Uuid is a unique identifier used as an identifier in many fields. The uuid module of python is used to generate it.In other words, there are four uuid generation methods provided by python: 1. generate from

Simple tutorial on using the Mako Template Library in Python, pythonmako Template Library Mako is a high-performance Python template library. Its syntax and API use many other template libraries, such as Django and Jinja2.Basic usage The most basic