python 全局变量的import机制介绍

from abc import ABCMeta, abstractmethod
print __name__

class IServer:
  def __init__(self):
    pass

  @abstractmethod
  def DoWithA(self):
    pass

  @abstractmethod
  def DoWithB(self):
    pass

import IServer
serverType ='1001'
print __name__
dir()
from CreatFactory import GLOBAL_class_dic
dir()
class IServer_A(IServer.IServer):
  def __init__(self):
    pass

  def DoWithA(self):
    print 'Server_A do with interface A'

  def DoWithB(self):
    print 'Server_A do with interface B'

global GLOBAL_class_dic

print 'the id of GLOBAL_class_dic in A is:',id(GLOBAL_class_dic)
GLOBAL_class_dic[serverType] = IServer_A
print 'GLOBAL_class_dic in a is:', GLOBAL_class_dic

import IServer
serverType ='1002'from CreatFactory import GLOBAL_class_dic
print __name__

class IServer_B(IServer.IServer):
  def __init__(self):
    pass

  def DoWithA(self):
    print 'Server_B do with interface A'

  def DoWithB(self):
    print 'Server_B do with interface B'

print 'the id of GLOBAL_class_dic in B is:',id(GLOBAL_class_dic)
GLOBAL_class_dic[serverType] = IServer_B
print 'GLOBAL_class_dic in b is:', GLOBAL_class_dic

#coding:UTF-8
import os;
import sys;
import threading
from misc import *

global GLOBAL_class_dic

GLOBAL_class_dic ={1:1}
print 'GLOBAL_class_dic in define is:', GLOBAL_class_dic
print 'the id of GLOBAL_class_dic in define is:', id(GLOBAL_class_dic)

dir()

import IServer_A
import IServer_B


def CreateServer(serverType):
  global GLOBAL_class_dic
  print 'GLOBAL_class_dic in use is:', GLOBAL_class_dic
  print 'the id of GLOBAL_class_dic in USE is:', id(GLOBAL_class_dic)
  if GLOBAL_class_dic.has_key(serverType):
    return GLOBAL_class_dic[serverType]
  else:
    return 'no'

if __name__ == '__main__':
  pass
  # 接收到报文后，根据报文的内容，从db中获取到serverType，假设获取到的serverType=1001

  print 'main'
  print 'GLOBAL_class_dic in main A is:', GLOBAL_class_dic
  serverType = '1002'
  server = CreateServer(serverType)
  print 'GLOBAL_class_dic in main B is:', GLOBAL_class_dic
  print 'server :',server
  server.DoWithA(server())

D:\Python27\python.exe "D:/DesignMode/Server --00/CreatFactory.py"
GLOBAL_class_dic in define is: {1: 1}
the id of GLOBAL_class_dic in define is: 36230176
['GLOBAL_class_dic', 'Misc', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'binascii', 'inspect', 'minidom', 'os', 'struct', 'sys', 'threading']
IServer
IServer_A
['IServer', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'serverType']
GLOBAL_class_dic in define is: {1: 1}
the id of GLOBAL_class_dic in define is: 36230032
['GLOBAL_class_dic', 'Misc', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'binascii', 'inspect', 'minidom', 'os', 'struct', 'sys', 'threading']
['IServer', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'serverType']
['GLOBAL_class_dic', 'IServer', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'serverType']
IServer_B
the id of GLOBAL_class_dic in B is: 36230032
GLOBAL_class_dic in b is: {1: 1, '1002': <class IServer_B.IServer_B at 0x022C2ED8>}
['GLOBAL_class_dic', 'IServer', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'serverType']
the id of GLOBAL_class_dic in A is: 36230032
GLOBAL_class_dic in a is: {1: 1, '1002': <class IServer_B.IServer_B at 0x022C2ED8>, '1001': <class IServer_A.IServer_A at 0x02273420>}
main
GLOBAL_class_dic in main A is: {1: 1}
GLOBAL_class_dic in use is: {1: 1}
the id of GLOBAL_class_dic in USE is: 36230176
GLOBAL_class_dic in main B is: {1: 1}
server : no
Traceback (most recent call last):
 File "D:/DesignMode/Server --00/CreatFactory.py", line 38, in <module>
  server.DoWithA(server())
AttributeError: 'str' object has no attribute 'DoWithA'

Process finished with exit code 1