import csv
result = []
with open('my.csv', 'rb') as in_file:
reader = csv.reader(in_file)
for line_num, line in enumerate(reader):
if line_num == 1:
line = ['modified', 'line']
result.append(line)
with open('my.csv', 'wb') as out_file:
writer = csv.writer(out_file)
writer.writerows(result)
你知道吗我的.csv你知道吗
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