题解 | #配置文件恢复#

import sys
from collections import OrderedDict
od = OrderedDict()
od['reset'] = 'reset what'
od['reset board'] = 'board fault'
od['board add'] = 'where to add'
od['board delete'] = 'no board at all'
od['reboot backplane'] = 'impossible'
od['backplane abort'] = 'install first'

unknown = 'unknown command'

def match_one(li):
    for key in od.keys():
        if 1 != len(key.split()):
            continue
        if key.startswith(li[0]):
            print(od[key])
            return
    print(unknown)

def match_two(li):
    for key in od.keys():
        if 2 != len(key.split()):
            continue
        if not key.split()[0].startswith(li[0]):
            continue
        if key.split()[1].startswith(li[1]):
            print(od[key])
            return
    print(unknown)

for line in sys.stdin.readlines():
    if not line.strip():
        print("")
        continue
    li = line.strip().split()
    size = len(li)
    if size == 1:
        match_one(li)
    elif size == 2:
        match_two(li)
    else:
        print(unknown)