ex.py

epoch2stat = {
    key: val
    for key, val in iteritems({
        k: tuple(
            (lambda stats: stats)(
                tuple(imap(itemgetter(1), v))
            )
        )
        for k, v in groupby(sorted(
            imap(
                lambda l: (l[0], l[1]),
                ifilter(
                    None,
                    imap(
                        lambda l: (
                            lambda fst: (
                                lambda three: (
                                    (
                                        int(three),
                                        l.rstrip()[l.rfind(':') + 2:],
                                    )
                                    if (
                                        three is not None
                                        and three.isdigit()
                                        and int(three[0]) < 4
                                        else None
                                    )
                                )(
                                    l[fst - 3:fst]
                                    if fst > -1
                                    else None
                                )
                            )(l.rfind(']')),
                            infile,
                        ),
                    ),
                ),
                key=itemgetter(0),
            ),
            itemgetter(0),
        ))
    })
    if val and len(val) == 2
}



# -----

def a():
    return groupby(sorted(
        imap(
            lambda l: (l[0], l[1]),
            ifilter(
                None,
                imap(
                    lambda l: (
                        lambda fst: (
                            lambda three: (
                                (
                                    int(three),
                                    l.rstrip()[l.rfind(':') + 2:],
                                )
                                if (
                                    three is not None
                                    and three.isdigit()
                                    and int(three[0]) < 4
                                    else None
                                )
                            )(
                                l[fst - 3:fst]
                                if fst > -1
                                else None
                            )
                        )(l.rfind(']')),
                        infile,
                    ),
                ),
            ),
            key=itemgetter(0),
        ),
        itemgetter(0),
    ))


def b(grouped):
    for k, v in grouped:
        v = tuple(imap(itemgetter(1), v))
        if len(v) == 2:
            yield (k, v)


epoch2stat = dict(b(a()))