f = open("file.txt")

sys.stdin.buffer
sys.stdin.buffer.raw
sys.stdin.fileno()

sin = open(sys.stdin.fileno(), <your open arguments here>)

sys.stdin = sin

sys.stdin = io.TextIOWrapper(sys.stdin.buffer)

sys.stdin = io.TextIOWrapper(sys.stdin.buffer, newline="", encoding="utf-8")
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, newline="rn")