反复从Python中读取CSV？

Question

我正在尝试检查已提取的csv提取数据的值.它只会遍历CSV的行一次,我只能检查feed.items()的一个值.我需要重置某个值吗？有没有更好/更有效的方法来做到这一点？谢谢.

orig = csv.reader(open("googlel.csv", "rb"), delimiter = ';')
goodrows = []
for feed in gotfeeds:    
   for link,comments in feed.items():
       for row in orig:
           print link
           if link in row[1]:
               row.append(comments)
               goodrows.append(row)

Answer 1

您可以通过重置文件对象的读取位置来"重置"CSV迭代器.

data = open("googlel.csv", "rb")
orig = csv.reader(data, delimiter = ';')
goodrows = []
for feed in gotfeeds:    
   for link,comments in feed.items():
       data.seek(0)
       for row in orig:
           print link
           if link in row[1]:
               row.append(comments)
               goodrows.append(row)

Answer 2

制作orig列表避免了重置/重新分析csv的需要:

orig = list(csv.reader(open("googlel.csv", "rb"), delimiter = ';'))