Import csv

Def colreader (file name, * parameter, *kwarg):

Use open (file name,' r') as f:

reader = csv.reader(f，*arg，**kwarg)

Length = 0

For rows in the reader:

Length = length (line)

break

Reader = List (Reader)

For I (length) in the range:

Result = [x[i] for x in reader]

Yield result

Restricted by level. The reader in csv module is similar to a generator, and the iteration encounters some problems, so it is simply and rudely regarded as a list. When encountering a large amount of data, it will crash, so it can only be used temporarily, and the formal use needs to be improved.