Python将多个不等列表写入Excel文件

Question

I have mutiple lists

ANNA=(1, 2, 3, 4)
MAE=(1,2)
CEL=(1,2,3,4,5,6,7)

I want to write them in an excel or csv file format which looks like this:

When I used csv writer, i need to use writerow with additonal ' so that the values will not be truncated in excel. It's fine, but still the other column is not appearing.

I use python3.x so izip does not work I guess coz I've tried it. I tried pandas and DataFrame but the columns need to be of equal lengths and my data is big and i do not know how to place NaN to my missing values. Besides, I wonder if there is a way instead of replacing NaN to equalize my columns it does not look good.

Thanks in advance!

Answer 1

I think this works for you:

import csv
from itertools import zip_longest


ANNA = (1, 2, 3, 4)
MAE = (1, 2)
CEL = (1, 2, 3, 4, 5, 6, 7)

with open('output.csv', 'w') as outcsv:
    writer = csv.writer(outcsv)
    writer.writerow(["ANNA", "MAE", "CEL"])
    for row in zip_longest(ANNA, MAE, CEL):
        writer.writerow(row)

Reference:

• zip_longest: https://pymotw.com/3/itertools/index.html#merging-and-splitting-iterators

Answer 2

You can use zip_longest in python 3:

>>> x = zip_longest(ANNA, MAE, CEL)
>>> [k for k in x]
[(1, 1, 1), (2, 2, 2), (3, None, 3), (4, None, 4), (None, None, 5), (None, None, 6), (None, None, 7)]