求助修复并格式化美国州际公路编号判定的Python代码

原代码存在的问题 #

• 缩进不符合Python规范，分支下代码未统一缩进，触发语法错误
• 偶数判断行多写了一个右括号，存在语法错误
• 单词拼写错误：辅路对应英文auxiliary被误写为auxillary
• 输出逻辑分散，没有按照需求整合成符合示例格式的单行输出
• 变量作用域问题：主路编号变量仅在主路分支定义，辅路分支判断走向时会报错
• 无效编号的输出内容和需求示例不一致

修复后代码 #

highway_number = int(input("Enter highway number: "))

# 校验编号合法性
if highway_number < 1 or highway_number > 999:
    print(f"{highway_number} is not a valid interstate highway number.")
else:
    # 区分主路/辅路，确定服务的主路编号
    if highway_number > 99:
        is_primary = False
        serving_primary = highway_number % 100
    else:
        is_primary = True
        serving_primary = highway_number
    
    # 判断走向
    if serving_primary % 2 == 0:
        direction = "east/west"
    else:
        direction = "south/north"
    
    # 按格式输出
    if is_primary:
        print(f"I-{highway_number} is primary, going {direction}.")
    else:
        print(f"I-{highway_number} is auxiliary, serving I-{serving_primary}, going {direction}.")

运行效果 #

• 输入90，输出：I-90 is primary, going east/west.
• 输入290，输出：I-290 is auxiliary, serving I-90, going east/west.
• 输入0，输出：0 is not a valid interstate highway number.

内容的提问来源于stack exchange，提问作者Loki