我有以下代码：
import os
csv_out = 'femaleconsolidated.csv'
csv_list = [r'C:\Users\PycharmProjects\filemerger\Female\outputA.csv',
r'C:\Users\PycharmProjects\filemerger\Female\outputB.csv',
r'C:\Users\PycharmProjects\filemerger\Female\outputC.csv',
r'C:\Users\PycharmProjects\filemerger\Female\outputD.csv',
r'C:\Users\PycharmProjects\filemerger\Female\outputE.csv',
r'C:\Users\PycharmProjects\filemerger\Female\outputother.csv']
print(csv_list)
csv_merge = open(csv_out, 'w')
for file in csv_list:
csv_in = open(file)
for line in csv_in:
csv_merge.write(line)
csv_in.close()
csv_merge.close()
print('Verify consolidated CSV file : ' + csv_out)
该代码是合并CSV。当然open(file)应该打开文件，但是我得到了：
csv_merge.write(line)
ValueError: I/O operation on closed file.
是什么原因造成的？
csv_merge.close()这应该放在for循环之外-因为您仍在csv_merge下一次迭代中写入：
for file in csv_list:
csv_in = open(file)
for line in csv_in:
csv_merge.write(line)
csv_in.close()
csv_merge.close()
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