from __future__ import unicode_literals` is not required for python3 · line/line-bot-sdk-python@f364129 · GitHub
use `from __future__ import division, print_function, absolute_imports` to imply `--target-version=py27` · Issue #1644 · psf/black · GitHub
Don't use u"..." in Python 2.7 when there's `from __future__ import unicode_literals` · Issue #188 · psf/black · GitHub
![python - (unicode error) 'unicodeescape' codec can't decode bytes - string with '\u' - Stack Overflow python - (unicode error) 'unicodeescape' codec can't decode bytes - string with '\u' - Stack Overflow](https://i.stack.imgur.com/sHQSx.gif)