for lin in openfile:

[snippsat]

The usage of what @buran link to.

uni_hello = 'hello Χαίρετε добры дзень 여보세요'

with open('uni_hello.txt', 'w', encoding='utf-8') as f_out:
    f_out.write(uni_hello)

with open('uni_hello.txt', encoding="utf-8") as f:
    print(f.read())

Output:
hello Χαίρετε добры дзень 여보세요

A couple of advice when all fails.

with open('some_file', encoding='utf-8', errors='ignore') as f:
with open('some_file', encoding='utf-8', errors='replace') as f:

ftfy fixes Unicode that’s broken in various ways.