def divideSeries(requestContext, dividendSeriesList, divisorSeriesList):
    """
    Takes a dividend metric and a divisor metric and draws the division result.
    A constant may *not* be passed. To divide by a constant, use the scale()
    function (which is essentially a multiplication operation) and use the
    inverse of the dividend. (Division by 8 = multiplication by 1/8 or 0.125)

    Example::

        &target=divideSeries(Series.dividends,Series.divisors)


    """
    if len(divisorSeriesList) == 0:
        for series in dividendSeriesList:
            series.name = "divideSeries(%s,MISSING)" % series.name
            series.pathExpression = series.name
            for i in range(len(series)):
                series[i] = None
            return dividendSeriesList
    if len(divisorSeriesList) > 1:
        raise ValueError(
            "divideSeries second argument must reference exactly 1 series"
            " (got {0})".format(len(divisorSeriesList)))

    [divisorSeries] = divisorSeriesList
    results = []

    for dividendSeries in dividendSeriesList:
        name = "divideSeries(%s,%s)" % (dividendSeries.name,
                                        divisorSeries.name)
        bothSeries = (dividendSeries, divisorSeries)
        step = reduce(lcm, [s.step for s in bothSeries])

        for s in bothSeries:
            s.consolidate(step / s.step)

        start = min([s.start for s in bothSeries])
        end = max([s.end for s in bothSeries])
        end -= (end - start) % step

        values = (safeDiv(v1, v2) for v1, v2 in zip_longest(*bothSeries))

        quotientSeries = TimeSeries(name, start, end, step, values)
        quotientSeries.pathExpression = name
        results.append(quotientSeries)

    return results

    Takes a dividend metric and a divisor metric and draws the division result.
    A constant may *not* be passed. To divide by a constant, use the scale()
    function (which is essentially a multiplication operation) and use the
    inverse of the dividend. (Division by 8 = multiplication by 1/8 or 0.125)

    Example::

        &target=divideSeries(Series.dividends,Series.divisors)


    
graphite_api/functions.py