def blanket(expression):
    """blanket

        >>> print blanket('Huh?')
        (Huh?)

        >>> print blanket(blanket('Huh?'))
        (Huh?)
    """
    if isinstance(expression, Blanket):
        return expression
    else:
        return Blanket(expression)
blanket

        >>> print blanket('Huh?')
        (Huh?)

        >>> print blanket(blanket('Huh?'))
        (Huh?)
    
recipes/Python/415345_write_sql_via_python/recipe-415345.py