dict字典for循环key-value

from collections import Counter

a = "gbgkkdehh"
b = Counter(a)
print(b)
print(dict(b))

s = []
for i,j in dict(b).items():
    print(i,j)
    if j ==1:
        s.append(i)
print(s[1])


for i in dict(b).keys():
    print("key---",i)

for j in dict(b).values():
    print("value--",j)