import datetime

def filter_since(probs, since):

    '''

    Return problems that occurred `since` datetime

    '''

    return list(filter(lambda x: x.time > since, probs))

def filter_since_timestamp(probs, since_ts):

    '''

    Return problems that occurred `since` timestamp

    '''

    since = datetime.datetime.fromtimestamp(float(since_ts))

    return list(filter_since(probs, since))

def filter_until(probs, until):

    '''

    Return problems that occurred `until` datetime

    '''

    return list(filter(lambda x: x.time < until, probs))

def filter_until_timestamp(probs, until_ts):

    '''

    Return problems that occurred `until` timestamp

    '''

    until = datetime.datetime.fromtimestamp(float(until_ts))

    return list(filter_until(probs, until))

def filter_reported(probs):

    '''

    Return only reported problems

    '''

    return list(filter(lambda x: hasattr(x, 'reported_to'), probs))

def filter_not_reported(probs):

    '''

    Return only non-reported problems

    '''

    return list(filter(lambda x: not hasattr(x, 'reported_to'), probs))