计算个数为1字符及其下标
'''
求字符串"dfjkfjeijdkf" 计算个数为1字符及其下标
'''
def str_single(string):
a={}
for n,i in enumerate(string,0):
if i not in a:
a[i]=[n]
else:
a[i].append(n)
result = {}
for i,j in a.items():
if len(j) == 1:
result[i] = j[0]
return result
print(str_single("adsax"))