<pre><code>from datetime import datetime, timedelta
dt_str_list = ['2020-04-02T08:15:50+01:00', '2020-04-02T08:15:53+01:00',
'2020-04-02T08:15:56+01:00', '2020-04-02T08:16:01+01:00',
'2020-04-02T08:16:07+01:00', '2020-04-02T08:21:05+01:00',
'2020-04-02T08:21:17+01:00', '2020-04-02T08:21:30+01:00',
'2020-04-02T08:21:43+01:00', '2020-04-02T08:21:49+01:00',
'2020-04-02T08:22:11+01:00', '2020-04-02T08:22:16+01:00',
'2020-04-02T08:24:02+01:00', '2020-04-02T08:24:09+01:00',
'2020-04-02T08:24:37+01:00', '2020-04-02T08:36:26+01:00',
'2020-04-02T08:39:25+01:00', '2020-04-02T08:39:41+01:00',
'2020-04-02T08:39:52+01:00', '2020-04-02T08:40:18+01:00',
'2020-04-02T08:40:27+01:00', '2020-04-02T08:40:33+01:00',
'2020-04-02T08:40:49+01:00', '2020-04-02T08:41:03+01:00',
'2020-04-02T08:41:29+01:00', '2020-04-02T08:42:00+01:00',
'2020-04-02T08:42:23+01:00', '2020-04-02T08:42:57+01:00',
'2020-04-02T08:44:43+01:00', '2020-04-02T08:44:49+01:00']
dt_list = [datetime.strptime(dt_str, '%Y-%m-%dT%H:%M:%S%z')
for dt_str in dt_str_list]
minute_10 = timedelta(minutes=10)
flags = [1 if dt_list[i] - dt_list[i-1] > minute_10 else 0
for i in range(1, len(dt_list))]
</code></pre>