my_dict = dict()
print("创建了一个空字典")
my_value_list = ['15', '14', '13', '12', '16']

print("列表是 : " )
print(my_value_list)

my_value_list.sort()
print("排序后的列表是 :")
print(my_value_list)

for value in my_value_list:
   for element in range(int(value), int(value) + 2):
      my_dict.setdefault(element, []).append(value)

print("生成的字典是 : ")
print(my_dict)

创建了一个空字典
列表是 :
['15', '14', '13', '12', '16']
排序后的列表是 :
['12', '13', '14', '15', '16']
生成的字典是 :
{12: ['12'], 13: ['12', '13'], 14: ['13', '14'], 15: ['14', '15'], 16: ['15', '16'], 17: ['16']}