写入CSV文件：值错误：对关闭的文件执行I/O操作

Question

代码从卡中刮取单个事件，但我一直收到以下错误：

C：\Python27\python.exeC：/用户/詹姆斯/PycharmProjects/剪贴画/scrapy.py回溯（最近的调用最后）：文件"C：/用户/詹姆斯/PycharmProjects/剪贴画/scrapy.py"，第31行，在writer.writerow（c）值错误： I/O关闭文件的操作

我正在使用pyCharm。

退出代码为1的过程结束Python会动态创建csv文件，但我也尝试在项目中创建csv文件，但仍然收到相同的消息。我认为问题可能在于第31行拉链后的线。谢谢你的帮助。

import csv
from urllib import urlopen
from bs4 import BeautifulSoup

html = urlopen("http://www.gbgb.org.uk/resultsRace.aspx?id=1793467")
bsObj = BeautifulSoup(html)

one = bsObj.findAll("li", {"class": "first essential fin"})
two = bsObj.findAll("li", {"class": "essential greyhound"})

three = bsObj.findAll("li", {"class": "timeDistance"})
four = bsObj.findAll("li", {"class": "trap"})
five = bsObj.findAll("li", {"class": "sp"})
six = bsObj.findAll("li", {"class": "timeSec"})
seven = bsObj.findAll("li", {"class": "essential trainer"})
eight = bsObj.findAll("li", {"class": "first essential comment"})

firstessentialfin = [a.getText().strip() for a in one]
essentialgreyhound = [b.getText().strip() for b in two]
timeDistance = [c.getText().strip() for c in three]
trap = [d.getText().strip() for d in four]
sp = [e.getText().strip() for e in five]
timeSec = [f.getText().strip() for f in six]
essentialtrainer = [g.getText().strip() for g in seven]
firstessentialcomment = [h.getText().strip() for h in eight]

with open('dogfile.csv', 'wb') as csvfile:
    writer = csv.writer(csvfile, delimiter=",")
for c in zip(firstessentialfin, essentialgreyhound, timeDistance,    trap,sp, timeSec, essentialtrainer,
         firstessentialcomment):
    writer.writerow(c)

Answer 1

问题在于压痕。将for循环移动到具有上下文管理器主体的下：

with open('dogfile.csv', 'wb') as csvfile:
    writer = csv.writer(csvfile, delimiter=",")
    for c in zip(firstessentialfin, essentialgreyhound, timeDistance,    trap,sp, timeSec, essentialtrainer, firstessentialcomment):
        writer.writerow(c)