Answer by fantabolous for Is it possible to force Excel recognize UTF-8 CSV files automatically?

In Python, use encoding=utf-8-sig which is Python's name for UTF-8 with BOM. Just utf-8 will not get picked up by Excel or other Microsoft software.From https://docs.python.org/3/library/codecs.html:

To increase the reliability with which a UTF-8 encoding can be detected, Microsoft invented a variant of UTF-8 (that Python calls "utf-8-sig")

See also What is the difference between utf-8 and utf-8-sig?

Using the standard python csv lib, this would be:

with open('some.csv', 'w', newline='', encoding='utf-8-sig') as f:    writer = csv.writer(f)    writer.writerows(someiterable)

It also works with other libs such as pandas:

df.to_csv('some.csv', encoding='utf-8-sig')