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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 _mysql_isval(val):
 """ These types should either be ignored or have already been inserted into the SQL directly and dont need sqlalchemy to do it for us. """

    if _mysql_is_list(val):
        return False
    elif isinstance(val, mysql_col):
        return False
    elif val in [None, mysql_now, mysql_ignore]:
        return False
    return True