from collections import  Counter
from collections import Counter #匯入Counter函式
a = ["a","b","b","c","c","c"]
print(Counter(a))
b = dict(Counter(a))#轉化成字典
print(b)
print ([key for key,value in b.items()
 
 if value > 1]) #只展示重複元素
print ({key:value for key,value in b.items() if value > 1})

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