Pandas（Python）：如何将值应用于类似的行？
很抱歉，这个措词不当的问题，目前只有第一个小时更新为假日 e、 gPandas（Python）：如何将值应用于类似的行？,python,pandas,Python,Pandas,很抱歉，这个措词不当的问题，目前只有第一个小时更新为假日 e、 g 2013-01-01 00:00:00-元旦 2013-01-01 00:00:00-无 2013-01-01 00:00:00-无 我想使用Pandas（Python）将类似的假日应用于同一日期 在同一日期使用假日最有效的方法是什么？还有许多其他的假日可以使用吗 提前谢谢你 您可以尝试使用应用方法： 该函数的输入是要应用于每一行的函数。在这种情况下，“axis”应该为零，以便应用于每一行。使用一个名为“连同pandas a
- 2013-01-01 00:00:00-元旦
- 2013-01-01 00:00:00-无
- 2013-01-01 00:00:00-无
您可以尝试使用应用方法： 该函数的输入是要应用于每一行的函数。在这种情况下，“axis”应该为零，以便应用于每一行。使用一个名为“连同pandas apply”的库可以很好地解决您的问题。下面是一个简短的示例
import pandas as pd
import holidays
us_holidays = holidays.UnitedStates()
# Create a sample DataFrame. You can just use your own
data = pd.DataFrame(pd.date_range('2020-01-01', '2020-01-30'), columns=['date'])
data['holiday'] = data['date'].apply(lambda x: us_holidays.get(x))
print(data)
date holiday
0 2020-01-01 New Year's Day
1 2020-01-02 None
2 2020-01-03 None
3 2020-01-04 None
4 2020-01-05 None
5 2020-01-06 None
6 2020-01-07 None
7 2020-01-08 None
8 2020-01-09 None
9 2020-01-10 None
10 2020-01-11 None
11 2020-01-12 None
12 2020-01-13 None
13 2020-01-14 None
14 2020-01-15 None
15 2020-01-16 None
16 2020-01-17 None
17 2020-01-18 None
18 2020-01-19 None
19 2020-01-20 Martin Luther King, Jr. Day
20 2020-01-21 None
21 2020-01-22 None
22 2020-01-23 None
23 2020-01-24 None
24 2020-01-25 None
25 2020-01-26 None
26 2020-01-27 None
27 2020-01-28 None
28 2020-01-29 None
29 2020-01-30 None
IIUC，你只有一天中第一个小时的假期。这里是一个数据框架的小示例，其中包含两个月的数据和三天的三个假期
import pandas as pd
import numpy as np
df = pd.DataFrame({'temp':np.random.randint(50,110, 60*24)}, index=pd.date_range('2013-01-01', periods=(60*24), freq='H'))
df['Holiday'] = np.nan
df.loc['2013-01-01 00:00:00', 'Holiday'] = 'New Years Day'
df.loc['2013-02-02 00:00:00', 'Holiday'] = 'Groundhog Day'
df.loc['2013-02-14 00:00:00', 'Holiday'] = "Valentine's Day"
groupbydaydf['Holiday'] = df.groupby(df.index.day)['Holiday'].ffill()
print(df.head(40))
print(df['2013-02-02'])
print(df['2013-02-13':'2013-02-15'])
temp Holiday
2013-01-01 00:00:00 51 New Years Day
2013-01-01 01:00:00 71 New Years Day
2013-01-01 02:00:00 61 New Years Day
2013-01-01 03:00:00 90 New Years Day
2013-01-01 04:00:00 77 New Years Day
2013-01-01 05:00:00 69 New Years Day
2013-01-01 06:00:00 50 New Years Day
2013-01-01 07:00:00 99 New Years Day
2013-01-01 08:00:00 86 New Years Day
2013-01-01 09:00:00 72 New Years Day
2013-01-01 10:00:00 89 New Years Day
2013-01-01 11:00:00 62 New Years Day
2013-01-01 12:00:00 53 New Years Day
2013-01-01 13:00:00 91 New Years Day
2013-01-01 14:00:00 51 New Years Day
2013-01-01 15:00:00 93 New Years Day
2013-01-01 16:00:00 97 New Years Day
2013-01-01 17:00:00 83 New Years Day
2013-01-01 18:00:00 87 New Years Day
2013-01-01 19:00:00 58 New Years Day
2013-01-01 20:00:00 84 New Years Day
2013-01-01 21:00:00 92 New Years Day
2013-01-01 22:00:00 106 New Years Day
2013-01-01 23:00:00 104 New Years Day
2013-01-02 00:00:00 78 NaN
2013-01-02 01:00:00 104 NaN
2013-01-02 02:00:00 96 NaN
2013-01-02 03:00:00 103 NaN
2013-01-02 04:00:00 60 NaN
2013-01-02 05:00:00 87 NaN
2013-01-02 06:00:00 108 NaN
2013-01-02 07:00:00 85 NaN
2013-01-02 08:00:00 67 NaN
2013-01-02 09:00:00 61 NaN
2013-01-02 10:00:00 91 NaN
2013-01-02 11:00:00 79 NaN
2013-01-02 12:00:00 99 NaN
2013-01-02 13:00:00 82 NaN
2013-01-02 14:00:00 75 NaN
2013-01-02 15:00:00 90 NaN
temp Holiday
2013-02-02 00:00:00 82 Groundhog Day
2013-02-02 01:00:00 58 Groundhog Day
2013-02-02 02:00:00 102 Groundhog Day
2013-02-02 03:00:00 90 Groundhog Day
2013-02-02 04:00:00 79 Groundhog Day
2013-02-02 05:00:00 50 Groundhog Day
2013-02-02 06:00:00 50 Groundhog Day
2013-02-02 07:00:00 83 Groundhog Day
2013-02-02 08:00:00 80 Groundhog Day
2013-02-02 09:00:00 50 Groundhog Day
2013-02-02 10:00:00 52 Groundhog Day
2013-02-02 11:00:00 69 Groundhog Day
2013-02-02 12:00:00 100 Groundhog Day
2013-02-02 13:00:00 61 Groundhog Day
2013-02-02 14:00:00 62 Groundhog Day
2013-02-02 15:00:00 76 Groundhog Day
2013-02-02 16:00:00 83 Groundhog Day
2013-02-02 17:00:00 109 Groundhog Day
2013-02-02 18:00:00 109 Groundhog Day
2013-02-02 19:00:00 81 Groundhog Day
2013-02-02 20:00:00 52 Groundhog Day
2013-02-02 21:00:00 108 Groundhog Day
2013-02-02 22:00:00 68 Groundhog Day
2013-02-02 23:00:00 75 Groundhog Day
temp Holiday
2013-02-13 00:00:00 93 NaN
2013-02-13 01:00:00 93 NaN
2013-02-13 02:00:00 74 NaN
2013-02-13 03:00:00 97 NaN
2013-02-13 04:00:00 58 NaN
2013-02-13 05:00:00 103 NaN
2013-02-13 06:00:00 79 NaN
2013-02-13 07:00:00 65 NaN
2013-02-13 08:00:00 72 NaN
2013-02-13 09:00:00 100 NaN
2013-02-13 10:00:00 66 NaN
2013-02-13 11:00:00 60 NaN
2013-02-13 12:00:00 95 NaN
2013-02-13 13:00:00 51 NaN
2013-02-13 14:00:00 71 NaN
2013-02-13 15:00:00 58 NaN
2013-02-13 16:00:00 58 NaN
2013-02-13 17:00:00 98 NaN
2013-02-13 18:00:00 61 NaN
2013-02-13 19:00:00 63 NaN
2013-02-13 20:00:00 57 NaN
2013-02-13 21:00:00 102 NaN
2013-02-13 22:00:00 69 NaN
2013-02-13 23:00:00 86 NaN
2013-02-14 00:00:00 94 Valentine's Day
2013-02-14 01:00:00 64 Valentine's Day
2013-02-14 02:00:00 62 Valentine's Day
2013-02-14 03:00:00 59 Valentine's Day
2013-02-14 04:00:00 93 Valentine's Day
2013-02-14 05:00:00 99 Valentine's Day
2013-02-14 06:00:00 64 Valentine's Day
2013-02-14 07:00:00 80 Valentine's Day
2013-02-14 08:00:00 89 Valentine's Day
2013-02-14 09:00:00 96 Valentine's Day
2013-02-14 10:00:00 60 Valentine's Day
2013-02-14 11:00:00 76 Valentine's Day
2013-02-14 12:00:00 82 Valentine's Day
2013-02-14 13:00:00 65 Valentine's Day
2013-02-14 14:00:00 90 Valentine's Day
2013-02-14 15:00:00 62 Valentine's Day
2013-02-14 16:00:00 64 Valentine's Day
2013-02-14 17:00:00 98 Valentine's Day
2013-02-14 18:00:00 52 Valentine's Day
2013-02-14 19:00:00 72 Valentine's Day
2013-02-14 20:00:00 108 Valentine's Day
2013-02-14 21:00:00 85 Valentine's Day
2013-02-14 22:00:00 87 Valentine's Day
2013-02-14 23:00:00 62 Valentine's Day
2013-02-15 00:00:00 106 NaN
2013-02-15 01:00:00 82 NaN
2013-02-15 02:00:00 77 NaN
2013-02-15 03:00:00 52 NaN
2013-02-15 04:00:00 94 NaN
2013-02-15 05:00:00 71 NaN
2013-02-15 06:00:00 95 NaN
2013-02-15 07:00:00 96 NaN
2013-02-15 08:00:00 71 NaN
2013-02-15 09:00:00 69 NaN
2013-02-15 10:00:00 85 NaN
2013-02-15 11:00:00 92 NaN
2013-02-15 12:00:00 106 NaN
2013-02-15 13:00:00 77 NaN
2013-02-15 14:00:00 65 NaN
2013-02-15 15:00:00 104 NaN
2013-02-15 16:00:00 98 NaN
2013-02-15 17:00:00 107 NaN
2013-02-15 18:00:00 106 NaN
2013-02-15 19:00:00 67 NaN
2013-02-15 20:00:00 59 NaN
2013-02-15 21:00:00 81 NaN
2013-02-15 22:00:00 56 NaN
2013-02-15 23:00:00 75 NaN
注意：在此数据框中，您的日期时间列位于索引中。非常感谢您的回答Heikki，但是是否有其他方法可以保持CSV的格式？（请参见附件中的屏幕截图）我必须在此数据集上执行EDA（显示的屏幕截图，不是完整的数据集）抱歉，如果我没有什么意义，我在这方面很新。提前谢谢。