python如何删除dict中重复value值的item

Question

字典z如下z={1:'a',2:'a',3:'a',4:'b',5:'c',6:'c',7:'d'}要求删除重复的value的item，只保留一个，如何实现？

Answer 1

tuple_r_dict=lambda_dict:dict(val[::-1]forvalin_dict.iteritems())#_dict.items()inPython3.x
tuple_r_dict(tuple_r_dict(z))orvalues=set()
forkeyinz.keys():
val=z[key]
ifvalinvalues:
delz[key]
else:
values.add(val)
                            

Answer 2

我再加一个吧.来晚了TTfunc=lambdaz:dict([(x,y)fory,xinz.items()])
printfunc(func(z))