def _response_delay(grouped):
ts = (total_seconds(b.datetime - a.datetime)
for conv in _conversations(grouped)
for a, b in pairwise(conv)
if b.direction == 'out' and a.direction == 'in')
return ts
def interevents_time(records):
"""
The interevent time between two records of the user.
"""
inter_events = pairwise(r.datetime for r in records)
inter = [total_seconds(new - old) for old, new in inter_events]
return summary_stats(inter, 0.99)