def _load_start_paths(self) -> None:
        "Start the Read-Eval-Print Loop."
        if self._startup_paths:
            for path in self._startup_paths:
                if os.path.exists(path):
                    with open(path, "rb") as f:
                        code = compile(f.read(), path, "exec")
                        exec(code, self.get_globals(), self.get_locals())
                else:
                    output = self.app.output
                    output.write(f"WARNING | File not found: {path}\n\n")
Start the Read-Eval-Print Loop.
src/ptpython/repl.py