Do I have to encode unicode variable before write to file?

问题

I read the "Unicdoe Pain" article days ago. And I keep the "Unicode Sandwich" in mind.

Now I have to handle some Chinese and I've got a list

chinese = [u'中文', u'你好']

Do i need to proceed encoding before writing to file?

add_line_break = [word + u'\n' for word in chinese]
encoded_chinese = [word.encode('utf-8') for word in add_line_break]
with open('filename', 'wb') as f:
    f.writelines(encoded_chinese)

Somehow I find out that in python2. I can do this:

chinese = ['中文', '你好']
with open('filename', 'wb') as f:
    f.writelines(chinese)

no unicode matter involed. :D

回答1:

You don't have to do that, you could use io or codecs to open the file with encoding.

import io
with io.open('file.txt', 'w', encoding='utf-8') as f:
    f.write(u'你好')

codecs.open has the same syntax.

回答2:

In python3;

with open('file.txt, 'w', encoding='utf-8') as f:
    f.write('你好')

will do just fine.

来源：https://stackoverflow.com/questions/45726305/do-i-have-to-encode-unicode-variable-before-write-to-file