类型错误参数%1需要是迭代器

Question

我目前正在尝试将数据从我的filteredData.csv复制到我的平均2016.csv，这是我已经完成的，但当我尝试拆分数据时，我得到了

File 
"U:/CISP253/Final/test", line 9, in <module>
    readCSV = csv.reader(csvfile, delimiter=',')
TypeError: argument 1 must be an iterator
>>> 

都是我的错。

import shutil
import csv
import collections
with open("filteredData.csv", "wb") as csvfile:
    csvfile.close()

with open("average2016.csv", "w") as csvfile2:
    shutil.copyfile('filteredData.csv', 'average2016.csv')
    readCSV = csv.reader(csvfile2, delimiter=',')
    result = collections.defaultdict(list)
    for row in readCSV:
       year = row[1].split("-")[0]
       result[year].append(row)

    csvfile2.close()

我对readCSV = csv.reader( csvfile2，delimiter='，')进行了必要的更改，如前所述将csvfile转换为csvfile2。另外，这是拆分日期的最好方法吗？

谢谢

Answer 1

你忘了换成csvfile2

with open("average2016.csv", "w") as csvfile2:
    shutil.copyfile('filteredData.csv', 'average2016.csv')
    readCSV = csv.reader(csvfile2, delimiter=',')