Python

Dynamic typeIn the objects we touch, there is a special kind of object, which is used to store data, and the common objects include various numbers, strings, tables, dictionaries. In the C language, we call these data structures variables, and in

1. Date output formattingAll date and time APIs are within the DateTime module.1. DateTime = = stringnow = Datetime.datetime.now () now.strftime ('%y-%m-%d%h:%m:%s')# output 2012-03-05 16:26:23.870105Strftime is an instance method of a DateTime

Nonsense not to say, direct (the first one is the script written by Python, the second and third is the shell):650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/54/93/wKiom1SGpk6Ttl_MAAVPK2KJQoE175.jpg "title=" Python and shell efficiency

Download content: NDK (r9d, note: r10d appears defective), ant, cocos2d-x-3.2, Python, CDT need to be configured in eclipseOther essential tools eclispe+adt+jdk don't say much.Ant Address: Http://mirrors.hust.edu.cn/apache//ant/binaries/apache-ant-1.

PEP8 Python Coding Specification One code orchestration 1 indent. Indentation of 4 spaces (the editor can do this), no tap, no mix of taps and spaces.2 The maximum length per line is 79, the line break can use backslashes, preferably with

OS version:[email protected] etc]# cat Redhat-releaseRed Hat Enterprise Linux Server Release 5.4 (Tikanga)---run Yum error[email protected] ~]# Yum Install dialogThere was a problem importing one of the Python modulesRequired to run Yum. The error

Recently wrote a crawler system, need to use the Python logging module, so they learned a bit.The log system in the Python standard library is supported from Python2.3. As long as import logging This module can be used. If you want to develop a log

Although Python is an explanatory language, it is object-oriented and can be programmed with objects.First, how to define a classBefore you go into Python-oriented programming, learn several terms: classes, class objects, instance objects,

When Python first emerged on the software scene in the early 1990s, it spawned what's now something of a classic conflict Between its proponents and those of another popular scripting language, Perl. Personally, I think the debate is tired and

This chapter only covers all the basic I/O functions, and more functions refer to the Python standard documentation.Print to screenThe simplest way to output this is to use the print statement, which you can pass 0 or more comma-separated

Recently in the "Python Source code Analysis", Python internal operating mechanism than previously understood deeper into the, feel that they have the opportunity to do a small dynamic scripting language, hehe, of course, is bragging. The goal, of

The first is the main program that saves the session sessions generated by the browser on disk.#-*-Coding:utf-8-*-‘‘‘@author: Cuiruiqiang@date: 2014-12-3@filename: countsession.py count Session ' s number‘‘‘Import WebWeb.config.debug = FalseUrls= ('/

Re is the most common regular expression module in Python, and the common methods include compile,match,findall,finditer,search,split,sub and so on.In some cases where the string itself is not easy to use, the RE module makes it easy to do some

This engaged for a day to understand, I am excited to die, OK, directly on the program, read it to understand:Program 1:#coding: U8#a. pyClass A ():def __init__ (self):Self.name= ' Xiaolei 'def get_name (self):Return Self.namedef set_name (self,name)

First look at the matrix. The result of a operation1>>> A=mat ([[1,2,3],[2,3, 0]]);2>>>a3Matrix ([[[1, 2, 3],4[2, 3, 0]])5>>>A.A6Array ([[[1, 2, 3],7[2, 3, 0]])8>>>shape (a)9(2, 3)Ten>>>shape (A.A) One(2, 3) A>>>type (a) -class

We sometimes need to upgrade the packages of the third party installed on the system to the latest version. However, both Easy_install and Pip have no direct command to use.We can use the following command to see which packages on the system are out

Python Lowercase to uppercase amount Excerpt from: http://shine-it.net/index.php?topic=14575.0 def_rmb_upper (self, value):"""RMB capitalization from: http://topic.csdn.net/u/20091129/20/b778a93d-9f8f-4829-9297-d05b08a23f80.html The value of the

#-*-coding:cp936-*-Import Ctypesimport ctypes.wintypes#print (dir (ctypes)) #print (dir (ctypes.wintypes)) User32= cTYPES. Windll ("user32.dll") Findwindowa=User32. Findwindowagetwindowtexta=User32. Getwindowtextaenumwindows=User32.

Assignment statementsNormal Assignment:>>> x, y, z =>>> print x, Y, Z1 2 3>>> x, y = y,x>>> print x, y2 1Tuple (Sequence) unpack assignment:>>> a = (a)>>> x, y, z = a>>> x1Dictionary assignment:>>> people = {"Name": "CQ", "Age": "20"}>>> Key,value =

The python command line can also be automatically completed, and the python command line can be completed. Many people know that iPython has good auto-completion capabilities, but it does not necessarily know that python can also be supplemented by