Synnefo

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import re

_regexfilter = re.compile('(!?)\s*(\S+?)\s*(?:(=|!=|<=|>=|<|>)\s*(\S*?)\s*)?$', re.UNICODE)

def parse_filters(terms):

    included = []

    excluded = []

    opers = []

    match = _regexfilter.match

    for term in terms:

        m = match(term)

        if m is None:

            continue

        neg, key, op, value = m.groups()

        if neg:

            excluded.append(key)

        elif op:

            opers.append((key, op, value))

        elif not value:

            included.append(key)

    return included, excluded, opers