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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 _parse_row(row, sep=','):
    '''parse row is a helper function to simply clean up a string, and parse
       into a row based on a delimiter. If a required length is provided,
       we check for this too.

    '''
    parsed = row.split(sep)
    parsed = [x for x in parsed if x.strip()]
    return parsed