大家来讨论一下下面内容手写分析过程

class MyData(object):
a=1
def init(self,x):
self.a=x
MyData.a+=x
a=x//2-1
print("a=",a)
obj1=MyData(6); obj1.a-=3; MyData.a//=3
obj2=MyData(10); MyData.a+=obj1.a-5; obj2.a//=2
obj1=MyData(13); obj1.a-=2;
print ("obj1.a=",obj1.a," obj2.a=",obj2.a," MyData.a=",MyData.a)