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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def raw_shell(s):
    'Not a member of ShellQuoted so we get a useful error for raw strings'
    if isinstance(s, ShellQuoted):
        return s.do_not_use_raw_str
    raise RuntimeError('{0} should have been ShellQuoted'.format(s))