题解 | 字符串排序

def a_1():
    a = list(input().strip())
    dict1 = dict(enumerate(a))
    list1 = []
    for i in a:
     if i.isalpha():
        list1.append((i))
    list3 = sorted(list1, key=lambda x: x.upper())
    for (k, v) in dict1.items():
       if v.isalpha():
           continue
       elif not v.isalpha():
          list3.insert(k, v)
    print("".join(list3))

if __name__ == "__main__":
    a_1()