如何找出键为a 的索引

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

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)

img


s = [{'a':5},{'b':10},{'c':90},{'a':45},{'b':78},{'a':90},{'c':10}]

for i in s:
    if 'a' in i:
        print(s.index(i))

img

s = [{'a':5},{'b':10},{'c':90},{'a':45},{'b':78},{'a':90},{'c':10}]
key = "a"
#同时获取列表的索引和值
for index,value in enumerate(s):
    if key in value.keys():
        print(index)

img

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