python字典键的拆分

dict = {"a,b,c":"111"}
怎么拆成dict = {"a":"111","b":"111","c":"111"}呢？
有dalao会吗，怎么办鸭

dict = {"a,b,c":"111"}
dict1={}
for key,value in dict.items():
    for i in key.split(','):
        dict1[i]=value
print(dict1)

dict = {"a,b,c":"111"}

Dict = {}

for item in dict.items():
    for i in item[0].split(","):
        Dict[i] = item[1]