'SyntaxError: Non-UTF-8 code starting with '\xfe' in file

While writing the program, I ran into an error:

SyntaxError: Non-UTF-8 code starting with '\xfe' in file /Users/user/PycharmProjects/quick_trade/quick_trade/quick_trade/trading_sys.py on line 1, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

I tried changing encoding and python path. But it did not help. I have read several docs but nothing helped.

full code: https://github.com/VladKochetov007/quick_trade/tree/dev



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