1
2 def ChangeParameter1( count ):
3 count = 3
4
5 def ChangeParameter2( count ):
6 count[0] = 3
不会改变ct的值，函数调用后还是0
8 ct = 0
9 ChangeParameter1( ct )
10 print ct
会改变，是通过list来实现
12 ct = list()
13 ct.append( 0 )
14 ChangeParameter2( ct )
15 print ct[0]