问题：怎么样在两个字典中找相同点
answer：
eg1：
下面2个字典
a={'x':1,'y':2,'z':3}, b={'w':10,'x':11,'y':2},
1)找相同点: a.keys & b.keys()
2)Find keys in a that are not in b: a.keys()-b.keys()
3)过滤字典元素：c={key:a[key] for key in a.keys()-{'z','w'}}
问题：怎么样在两个字典中找相同点
answer：
eg1：
下面2个字典
a={'x':1,'y':2,'z':3}, b={'w':10,'x':11,'y':2},
1)找相同点: a.keys & b.keys()
2)Find keys in a that are not in b: a.keys()-b.keys()
3)过滤字典元素：c={key:a[key] for key in a.keys()-{'z','w'}}