按10分钟间隔对 pandas 数据帧进行分组

问题描述

给定以下 pandas 数据帧：

            timestamp
0     2018-10-05 23:07:02
1     2018-10-05 23:07:13
2     2018-10-05 23:07:23
3     2018-10-05 23:07:36
4     2018-10-05 23:08:02
5     2018-10-05 23:09:16
6     2018-10-05 23:09:21
7     2018-10-05 23:09:39
8     2018-10-05 23:09:47
9     2018-10-05 23:10:01
10    2018-10-05 23:10:11
11    2018-10-05 23:10:23
12    2018-10-05 23:10:59
13    2018-10-05 23:11:03
14    2018-10-08 03:35:32
15    2018-10-08 03:35:58
16    2018-10-08 03:37:16
17    2018-10-08 03:38:04
18    2018-10-08 03:38:30
19    2018-10-08 03:38:36
20    2018-10-08 03:38:42
21    2018-10-08 03:38:52
22    2018-10-08 03:38:57
23    2018-10-08 03:39:10
24    2018-10-08 03:39:27
25    2018-10-08 03:40:47
26    2018-10-08 03:40:54
27    2018-10-08 03:41:02
28    2018-10-08 03:41:12
29    2018-10-08 03:41:32

            timestamp       10min_period
0     2018-10-05 23:07:02   period_1
2     2018-10-05 23:07:23   period_1
1     2018-10-05 23:07:13   period_1
2     2018-10-05 23:07:23   period_1
3     2018-10-05 23:07:36   period_1
4     2018-10-05 23:08:02   period_1
5     2018-10-05 23:09:16   period_1
6     2018-10-05 23:09:21   period_1
7     2018-10-05 23:09:39   period_1
8     2018-10-05 23:09:47   period_1
9     2018-10-05 23:10:01   period_1
10    2018-10-05 23:10:11   period_1
11    2018-10-05 23:10:23   period_1
12    2018-10-05 23:10:59   period_1
13    2018-10-05 23:11:03   period_1
14    2018-10-08 03:35:32   period_2
15    2018-10-08 03:35:58   period_2
16    2018-10-08 03:37:16   period_2
17    2018-10-08 03:38:04   period_2
18    2018-10-08 03:38:30   period_2
19    2018-10-08 03:38:36   period_2
20    2018-10-08 03:38:42   period_2
21    2018-10-08 03:38:52   period_2
22    2018-10-08 03:38:57   period_2
23    2018-10-08 03:39:10   period_2
24    2018-10-08 03:39:27   period_2
25    2018-10-08 03:40:47   period_2
26    2018-10-08 04:40:54   period_3
27    2018-10-08 04:41:02   period_3
28    2018-10-08 04:41:12   period_3
29    2018-10-08 04:41:32   period_3

a = df['timestamp'].offsets.DateOffset(minutes=10)

然而，它不起作用。你知道如何将我的df分割成10分钟的时间段吗？这项质询与其他质询不同，因为我没有指明何时开始计算。也就是说，我从第一个DateTime行实例开始计数，并从该实例开始计算10个时间分钟的周期。

更新：

转换为DateTime对象后，我还尝试

df['timestamp'].groupby(pd.TimeGrouper(freq='10Min'))

但是，我收到了：

TypeError: Only valid with DatetimeIndex, TimedeltaIndex or PeriodIndex, but got an instance of 'RangeIndex'

推荐答案

df['timestamp'] = pd.to_datetime(df['timestamp'])
diffs = df['timestamp'] - df['timestamp'].shift()
laps = diffs > pd.Timedelta('10 min')
periods = laps.cumsum().apply(lambda x: 'period_{}'.format(x+1))
df['10min_period'] = periods

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