Method child

Lib/test/test_builtin.py:2650–2663

(wpipe)

        if not sys.stdin.isatty() or not sys.stdout.isatty():
            self.skipTest("stdin and stdout must be ttys")
        def child(wpipe):
            # Check the error handlers are accounted for
            if stdio_encoding:
                sys.stdin = io.TextIOWrapper(sys.stdin.detach(),
                                             encoding=stdio_encoding,
                                             errors=stdin_errors)
                sys.stdout = io.TextIOWrapper(sys.stdout.detach(),
                                              encoding=stdio_encoding,
                                              errors=stdout_errors)
            print("tty =", sys.stdin.isatty() and sys.stdout.isatty(), file=wpipe)
            try:
                print(ascii(input(prompt)), file=wpipe)
            except BaseException as e:
                print(ascii(f'{e.__class__.__name__}: {e!s}'), file=wpipe)
        with self.detach_readline():
            lines = self.run_child(child, terminal_input + b"\r\n")
        # Check we did exercise the GNU readline path