Valor de rendimento do arquivo csv python

import csv
import numpy as np

def getData(filename1, filename2):
    with open(filename1, "rb") as csv1, open(filename2, "rb") as csv2:
        reader1 = csv.reader(csv1)
        reader2 = csv.reader(csv2)
        for row1, row2 in zip(reader1, reader2):
            yield (np.array(row1, dtype=np.float),
                   np.array(row2, dtype=np.float)) 
                # This will give arrays of floats, for other types change dtype

for tup in getData("file1", "file2"):
    print(tup)
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