题解 | 配置文件恢复

简单的字符串匹配

import sys

commands = {
    ("reset", "board"): "board fault",
    ("board", "add"): "where to add",
    ("board", "delete"): "no board at all",
    ("reboot", "backplane"): "impossible",
    ("backplane", "abort"): "install first",
}

for line in sys.stdin:
    a = line.split()
    if len(a) == 1:
        if "reset".startswith(a[0]):
            print("reset what")
        else:
            print("unknown command")
    elif len(a) == 2:
        results = []
        for each in commands:
            if each[0].startswith(a[0]) and each[1].startswith(a[1]):
                results.append(commands[each])
        if len(results) == 1:
            print(results[0])
        else:
            print("unknown command")
    else:
        print("unknown command")