计算分钟时间间隔之间的行数 - Python

Question

我想使用groupby函数计算30分钟时间间隔的行数，从第一个单元格向下列计算30分钟间隔。这是我有的：

    LOGINID DATE    TIME
    mickey  1/1/2018    0 days 08:54:00.000000000
    mickey  1/1/2018    0 days 08:57:00.000000000
    mickey  1/1/2018    0 days 09:01:00.000000000
    mickey  1/1/2018    0 days 09:19:00.000000000
    mickey  1/1/2018    0 days 09:26:00.000000000
    mickey  1/1/2018    0 days 09:41:00.000000000
    mickey  1/1/2018    0 days 10:03:00.000000000
    mickey  1/1/2018    0 days 11:35:00.000000000
    mickey  1/1/2018    0 days 11:36:00.000000000
    mickey  1/2/2018    0 days 09:54:00.000000000
    mickey  1/2/2018    0 days 10:21:00.000000000
    minnie  1/1/2018    0 days 09:00:00.000000000
    minnie  1/1/2018    0 days 10:20:00.000000000
    minnie  1/1/2018    0 days 10:14:00.000000000
    minnie  1/1/2018    0 days 10:51:00.000000000
    minnie  1/1/2018    0 days 11:05:00.000000000
    minnie  1/1/2018    0 days 11:24:00.000000000
    minnie  1/2/2018    0 days 02:20:00.000000000
    minnie  1/2/2018    0 days 02:25:00.000000000
    minnie  1/2/2018    0 days 02:39:00.000000000

This is what I want: 
LOGINID DATE    TIME    intense_cnt
mickey  1/1/2018    0 days 08:54:00.000000000   4
mickey  1/1/2018    0 days 08:57:00.000000000   4
mickey  1/1/2018    0 days 09:01:00.000000000   3
mickey  1/1/2018    0 days 09:19:00.000000000   3
mickey  1/1/2018    0 days 09:26:00.000000000   2
mickey  1/1/2018    0 days 09:41:00.000000000   2
mickey  1/1/2018    0 days 10:03:00.000000000   1
mickey  1/1/2018    0 days 11:35:00.000000000   2
mickey  1/1/2018    0 days 11:36:00.000000000   2
mickey  1/2/2018    0 days 09:54:00.000000000   2
mickey  1/2/2018    0 days 10:21:00.000000000   1
minnie  1/1/2018    0 days 09:00:00.000000000   1
minnie  1/1/2018    0 days 10:20:00.000000000   2
minnie  1/1/2018    0 days 10:14:00.000000000   2
minnie  1/1/2018    0 days 10:51:00.000000000   2
minnie  1/1/2018    0 days 11:05:00.000000000   2
minnie  1/1/2018    0 days 11:24:00.000000000   1
minnie  1/2/2018    0 days 02:20:00.000000000   3
minnie  1/2/2018    0 days 02:25:00.000000000   3
minnie  1/2/2018    0 days 02:39:00.000000000   3

所以对于第一行，我从8:54开始向下计算30分钟，这是9:24，这将给我总共4行。然后对于第二行，我从8:57向下计算30分钟，这是9:27，这将给我总共4行然后对于第三行，我从9:01向下计数30分钟，这是9:31，这将给我总共3行，依此类推。

谁会知道怎么做？

非常感谢！

Answer 1

不确定你是否也要计算“当前”日期，因为在你的解释中你认为不一致。在我的代码中，您可以通过将>调整为>=来轻松更改它。

Code

from datetime import timedelta
from dateutil import parser
import pandas as pd

dates = [
"2018-2-1 08:54:00",
"2018-2-1 08:57:00",
"2018-2-1 09:01:00",
"2018-2-1 09:19:00",
"2018-2-1 09:26:00",
"2018-2-1 09:41:00",
"2018-2-1 10:03:00",
"2018-2-1 11:35:00",
"2018-2-1 11:36:00",
"2018-2-1 09:54:00",
"2018-2-1 10:21:00",
"2018-2-1 09:00:00",
"2018-2-1 10:20:00",
"2018-2-1 10:14:00",
"2018-2-1 10:51:00",
"2018-2-1 11:05:00",
"2018-2-1 11:24:00",
"2018-2-2 02:20:00",
"2018-2-2 02:25:00",
"2018-2-2 02:39:00"]

dates = pd.DataFrame([parser.parse(date) for date in dates])

counts = [
    int(dates[(dates > date)
        & (dates <= (date + timedelta(minutes=30)))].count())
    for date in dates[0]
]

Result

[4, 4, 2, 2, 2, 2, 3, 1, 0, 4, 1, 3, 1, 2, 1, 2, 2, 2, 1, 0]