使用python列出為csv格式

Question

a = [{'year': 222, 'title': 'abc'}, {'year': 111, 'title': 'ddd'}]

我如何轉換為csv格式，如

b =     year, title
        222, abc
        111, ddd

我使用無法導入熊貓的AWS Lambda

Answer 1

使用csv.dictwriter

import csv
import io


a = [{'year': 222, 'title': 'abc'}, {'year': 111, 'title': 'ddd'}]
f = io.StringIO()
fieldnames = ['year', 'title']
writer = csv.DictWriter(f, fieldnames=fieldnames)
writer.writeheader()
for d in a:
    writer.writerow(d)

print(f.getvalue())

out:
year,title
222,abc
111,ddd