ref

http://www.runoob.com/python/python-object.html

note

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
class Employee:
   '所有员工的基类'
   empCount = 0
 
   def __init__(self, name, salary):
      self.name = name
      self.salary = salary
      Employee.empCount += 1
   
   def displayCount(self):
     print "Total Employee %d" % Employee.empCount
 
   def displayEmployee(self):
      print "Name : ", self.name,  ", Salary: ", self.salary

__init__()方法是一种特殊的方法，被称为类的构造函数或初始化方法

当创建了这个类的实例时就会调用该方法

self代表类的实例，而非类

0320 更新 ： 我们需要给 class 的方法加上self 参数， 而对函数，不用加这个强制参数

class outer1():
	sess_hdl = 0
	def __init__(self):
		print "out1 init"

	def out_me1(self):
		sess_hdl = "string 0"
		print sess_hdl
class outer2():
	def __init__(self):
		print "out2 init"

	def out_me2(self):
		t = outer1()

		print t.sess_hdl
		t.out_me1()
		print t.sess_hdl
		# 以上三行，依次打印出：
		#0
		#string 0
		#0
		print "outer2 call 1 done"
def main():
	print "main start"
	o2 = outer2()
	o2.out_me2()
	
if __name__ == '__main__':
	main()

output: