Look at the following:
/home/kinka/workspace/py/tutorial/tutorial/pipelines.py:33: Warning: Incorrect string value: \'\\xF0\\x9F\\x91\\x8A\\xF0\\x9F...\' fo
I think you should use utf8mb4 collation instead of utf8 and run
SET NAMES UTF8MB4
after connection with DB (link, link, link)