Question

此错误消息有什么问题？我用Google搜索，我仍然不知道

错误消息 Traceback（最近一次调用最后一次）：文件＆＃34; C：\ Users \ Acer \ Desktop \ Python Code Testing Bed \ Function 6 - 仍在 progress.py＆＃34;，第33行，in writer.writerow（[id_，name，combinedaddress，dateprinter，timeprinter，＆＃39;，＆＃39; .join（ingredients），totalprinter.group（1）]） ValueError：关闭文件的I / O操作

import csv
from itertools import groupby
from operator import itemgetter
import re

with open("rofl.csv", "rb") as f, open("out.csv", "wb") as out:
    reader = csv.reader(f)
    next(reader)
    writer = csv.writer(out)
    writer.writerow(["Receipt ID","Name","Address","Date","Time","Items","Amount","Cost","Total"])
    groups = groupby(csv.reader(f), key=itemgetter(0))
    for k, v in groups:
        v = list(v)
        id_, name = v[0]
        add_date_1, add_date_2 = [x[1] for x in v[1:3]]
        combinedaddress = add_date_1+ " " +add_date_2
        dateplustime = [ x[1] for x in v[4:8] ]
        abcd = str(dateplustime)
        dateprinter = re.search('(\d\d/\d\d/\d\d\d\d)\s(\d\d:\d\d)', abcd).group(1)
        timeprinter = re.search('(\d\d/\d\d/\d\d\d\d)\s(\d\d:\d\d)', abcd).group(2)
        transaction = [ x[1] for x in v[8:] ]
        textwordfortransaction = str(transaction)

        INGREDIENT_RE = re.compile(r"^\d+\s+([A-Za-z ]+)\s")
        ingredients = []
        for string in textwordfortransaction:
            match = INGREDIENT_RE.match(string)
            if match:
                ingredients.append(match.groups())
                continue

totalprinter = re.search(r"\bTOTAL\b\s*(\d*).",textwordfortransaction)
writer.writerow([id_, name, combinedaddress, dateprinter, timeprinter, ', '.join(ingredients), totalprinter.group(1)])

Answer 1

这是打开文件的地方：

with open("rofl.csv", "rb") as f, open("out.csv", "wb") as out:

with块建立上下文。只要保留此上下文，文件就会被关闭。这样：

writer.writerow([id_, name, combinedaddress, dateprinter, timeprinter, ', '.join(ingredients), totalprinter.group(1)])

...在with区块之外。程序到达此语句时文件已关闭，因为with块已结束。

将write.writerow缩进到with块内。

ValueError：关闭文件的I / O操作 - 已经用google搜索

1 个答案: