csv.writerow写到列而不是行

Question

I have a Python test file which is a list of strings that I am trying to export into a csv file so that each word in the string is in a single column in the csv file. However my code places each word into a separate column within a single row. I have read others comments regarding similar issues on this site and they suggested changing the syntax to wr.writerows([csv_data]) . This modification does not work on the code below. I am a beginner at Python so would greatly appreciate any suggestions on how to fix this.

testfile=['free', 'great', 'congratulations', 'great', 'kind', 'freedom']

import csv
with open("pos_words_pre.csv",'w') as resultFile_pos_pre:
    wr_pos_pre = csv.writer(resultFile_pos_pre)
    wr_pos_pre.writerow(testfile)

Thank you very much for the help

EDIT: The code above will place all the words in a csv file in the same row such as:
free, great, congratulations, great, kind, freedom

But I'm trying to create a file that has each entry in the same column but a separate row such as:

free
great
congratulations
great
kind
freedom

I though that writerow will write each entry into a separate row in an excel csv file rather than the same row. Do you know how to fix this?

Answer 1

writerow writes a single row. If you want to write multiple rows and use this function then you have to call it separately for each row:

import csv
testfile=['free', 'great', 'congratulations', 'great', 'kind', 'freedom']
with open("pos_words_pre.csv",'w') as resultFile_pos_pre:
    wr_pos_pre = csv.writer(resultFile_pos_pre)
    for row in testfile:
        wr_pos_pre.writerow([row])

Alternatively you can write many rows at once:

with open("pos_words_pre.csv",'w') as resultFile_pos_pre:
    wr_pos_pre = csv.writer(resultFile_pos_pre)
    wr_pos_pre.writerows(([row] for row in testfile))