CCF Python題解(100分)201604-3 路徑解析

import re

P = int(input())
currentdir = input()
for i in range(P):
    relpath = input()
    if relpath:  # 空字串
        if re.match('^(/)+$', relpath):  # 只由/構成
            print('/')
        else:
            if not re.match('^/', relpath):  # 是相對路徑
                relpath =
 
 currentdir + '/' + relpath
            relpath = relpath.rstrip("/")  # 去掉末尾/
            relpath = re.sub(r"(/)+", r"/", relpath)  # 將多個/化為/
            list1 = relpath.split('/')[1:]
            for index in range(len(list1)):
                if list1[index] == ".":
                    list1[index] = ""
                elif
 
 list1[index] == "..":
                    list1[index] = ""
                    for j in range(index - 1, -1, -1):
                        if list1[j] != "":
                            list1[j] = ""
                            break
            str1 = ""
            for i in list1:
                if
 
 i != "":
                    str1 += '/' + i
            if str1 == "":#每個都為空
                str1 = '/'
            print(str1)
    else:
        print(currentdir)