在Python中生成具有多个值的CSV

Question

{'id': '/en/45_2006', 'type': '/film/film', 'directed_by': ['Gary Lennon'], 'genre': ['Black comedy', 'Thriller', 'Psychological thriller', 'Indie film', 'Action Film', 'Crime Thriller', 'Crime Fiction', 'Drama'], 'name': '.45', 'initial_release_date': '2006-11-30'}

I have a list of such dictionaries from which I want to create a CSV file.

The following code seems to work fine. But when the dictionary has multiple values for a key (list) it writes the entire list as it is-

    keys = ['name', 'directed_by', 'genre', 'type', 'id', 'initial_release_date']
    with open('film.csv', 'w', newline='', encoding='utf8') as csvfile:
        dict_writer = csv.DictWriter(csvfile, keys)
        dict_writer.writeheader()
        dict_writer.writerows(filmlist)

How should I write the CSV files given the fact that certain keys have multiple values in a list and I want to write all of them.

Answer 1

This is an extension of jonrsharpes answer to take care of a special delimiter for your lists:

special_delim = '%'
for k, v in d.items():
     if isinstance(v, list):
        d[k] = special_delim.join(v)

Answer 2

You could convert all lists into strings first:

for k, v in d.items():
    if isinstance(v, list):
        d[k] = str(v)

and use ast.literal_eval to retrieve the list when you read the csv file back in.