从Python的两个列表中逐行追加csv？

Question

I have two lists in Python: 'away' and 'home'. I want to append them to an already existing csv file such that I write a row solely of 1st element of away, then 1st element of home, then the 2nd element of away, then the 2nd element of home,...etc with empty spaces in between them, so it will be like this:

away1
home1

away2
home2

away3
home3

and so on and so on. The size of the away and home lists is the same, but might change day to day. How can I do this?

Thanks

Answer 1

Looks like you just want the useful and flexible zip built-in.

>>> away = ["away1", "away2", "away3"]
>>> home = ["home1", "home2", "home3"]
>>> list(zip(away, home))
[('away1', 'home1'), ('away2', 'home2'), ('away3', 'home3')]

Answer 2

import csv

away = ["away1", "away2", "away3"]
home = ["home1", "home2", "home3"]
record_list = [ list(item) for item in list(zip(away, home)) ]
print record_list
with open("sample.csv", "a") as fp:
    writer = csv.writer(fp)
    writer.writerows(record_list)

# record_list =  [['away1', 'home1'], ['away2', 'home2'], ['away3', 'home3']]

You should use writerows method to write multiple list at a time to each row.