python global variable in class

; ', $gg 2 ); echo "\ n-------\ n"; Results Copy Code code as follows: ---in g2fun---- String (7) "$g 1 =>" String (2) "G1" Stri Ng (7) "$g 2 =>" NULL String (8) "$gg 2 =>" String (3) "GG2" ------- ---in 2.php---- String (7) "$g 1 =>" NULL String (7) "$g 2 =>" String (2) "G2" String (8) "$gg 2 =>" Br>string (3) "GG2" ------- ---in 2.php global---- String (7) "$g 1 =>"

Reference: http://rubyer.me/blog/485 Http://sunnyshuhai.iteye.com/blog/286970 In Ruby, global variables, instance variables, class variables, and symbol are often very different from other languages such as Java and are easy to mix up.First, there are no naming conventions. Note that these conventions are mandatory: Format Name Whether Initialization is required Scope Example

In python, the variable scope rules are somewhat different. In programming languages such as C/C ++ and java, global variables defined outside the function can be directly accessed within the function by default, however, this problem may occur in python. The following is an example. Test. py :#! /Usr/bin/pythonCOUNT

used to override the value of the variable during creation. Then the variable can be operated on in each file of the entire application.When the application is started, the system creates a PID, that is, the process ID, and all the activities will run on this process. Then we initialize the global variables when the application is created. All the activities of

, Python differs greatly from C in that not all statement blocks in Python will have scopes. Only when a variable is defined in module, Class (Class), Def (function), does it have the concept of scope. Look at the following code:#!/usr/bin/env pythondef func():

#-there is a declared local variableNAME = ["Product Manager","Riopo Wet"]defQupengfei ():GlobalName Name="own" Print('I'm doing', NAME) Qupengfei ()#The error example, all variables are placed under the local variable, is not possible, so if you want any global variables, try to put forward. NAME = ["Product Manager","Riopo Wet"]defQupengfei (): NAME="own" GlobalNAMEPrint('I'm doing', NAME) Qupengfe

C ++ Primer study note _ 22 _ class and data abstraction (8) -- static member variable, static member function, class/object size, _ 22 -- static I. static Each static data member is an object associated with the class and is not associated with the object of this class! Non

Recently in the project, encountered application This class, began not to know what to use, after learning to know that its use is quite large, for example, if you want to use global variables throughout the application, in Java is generally used static variables, public type In Android, if you use such a global variable