如何找出键为a 的索引

Question

s = [{'a':5},{'b':10},{'c':90},{'a':45},{'b':78},{'a':90},{'c':10}]
知道键是a
如何找出键为a 的索引

Answer 1

参考：

s = [{'a':5},{'b':10},{'c':90},{'a':45},{'b':78},{'a':90},{'c':10}]
key='a'
index = [i for i in range(len(s)) if key in s[i].keys()]
print(index)