在python字典中一次修改多个键的值

Question

Is it possible to change the values of multiple keys at once without the loop?

d = {1: 0, 2: 0, 3: 0}
for k in [1,2]:
    d[k] += 1

Answer 1

If all you want to do is replace values, then you can use dict.update :

d = {1:0, 2:0, 3:0}
d.update({1:1, 2:1})
# {1: 1, 2: 1, 3: 0}

but as far as I know, there's no way to make a custom change without using a loop of some sort. You could use a list comprehension to make a new dict to feed to .update() , doing it all in one line:

d.update({k: d[k] + 1 for k in [1, 2]})

but I don't think there's a general solution for modifying the dict in-place in this way.

Answer 2

应该能够使用字典的更新方法，只需包含您要更新的键和您希望它们具有的值。

mydict.update(dict(zip(keys, mytupleValues))))