[lang-ref] ( print_to_stderr ) ( python )

def test_print_to_stderr(capsys):
    # print(message, file=sys.stderr)
    import sys

    print('message', file=sys.stderr)

    captured = capsys.readouterr()
    assert captured.err == 'message\n'

def test_print_to_stderr_alternative(capsys):
    # sys.stderr.write(message)
    import sys

    sys.stderr.write('message')

    captured = capsys.readouterr()
    assert captured.err == 'message'