将字符串与元组列表中的元组进行比较

Question

正在尝试创建具有适当纳税年度的新列Tax_Year，该列是通过检查date列中的日期时间是否在单个txYear_的元组元素的边界内形成的

salesReport  = pd.DataFrame({'date': ['2017-07-02 09:00:00', '2017-07-03 15:00:00', '2018-04-05 15:00:00', 
                                    '2018-12-20 11:00:00', '2019-01-06 14:00:00', '2020-09-06 17:00:00'], 
                            'sales': [100, 339, 98, 1020, 630, 765]})

txYear_0304 = (dt.datetime(2003, 4, 6), dt.datetime(2004, 4, 5))
txYear_0405 = (dt.datetime(2004, 4, 6), dt.datetime(2005, 4, 5))
txYear_0506 = (dt.datetime(2005, 4, 6), dt.datetime(2006, 4, 5))
txYear_0607 = (dt.datetime(2006, 4, 6), dt.datetime(2007, 4, 5))
txYear_0708 = (dt.datetime(2007, 4, 6), dt.datetime(2008, 4, 5))
txYear_0809 = (dt.datetime(2008, 4, 6), dt.datetime(2009, 4, 5))
txYear_0910 = (dt.datetime(2009, 4, 6), dt.datetime(2010, 4, 5))
txYear_1011 = (dt.datetime(2010, 4, 6), dt.datetime(2011, 4, 5))
txYear_1112 = (dt.datetime(2011, 4, 6), dt.datetime(2012, 4, 5))
txYear_1213 = (dt.datetime(2012, 4, 6), dt.datetime(2013, 4, 5))
txYear_1314 = (dt.datetime(2013, 4, 6), dt.datetime(2014, 4, 5))
txYear_1415 = (dt.datetime(2014, 4, 6), dt.datetime(2015, 4, 5))
txYear_1516 = (dt.datetime(2015, 4, 6), dt.datetime(2016, 4, 5))
txYear_1617 = (dt.datetime(2016, 4, 6), dt.datetime(2017, 4, 5))
txYear_1718 = (dt.datetime(2017, 4, 6), dt.datetime(2018, 4, 5))
txYear_1819 = (dt.datetime(2018, 4, 6), dt.datetime(2019, 4, 5))
txYear_1920 = (dt.datetime(2019, 4, 6), dt.datetime(2020, 4, 5))
txYear_2021 = (dt.datetime(2020, 4, 6), dt.datetime(2021, 4, 5))

tax_year = [txYear_0304, txYear_0405, txYear_0506, txYear_0607, txYear_0708, txYear_0809, txYear_0910, txYear_1011, txYear_1112, 
            txYear_1213, txYear_1314, txYear_1415, txYear_1516, txYear_1617, txYear_1718, txYear_1819, txYear_1920,  txYear_2021]

当满足此条件时，我希望变量名出现在新列的相应行中

例如

                  date  sales      Tax_Year
0  2017-07-02 09:00:00    100   txYear_1617  
1  2017-07-03 15:00:00    339   txYear_1617
2  2018-04-05 15:00:00     98   txYear_1718 
3  2018-12-20 11:00:00   1020   txYear_1819
4  2019-01-06 14:00:00    630   txYear_1819
5  2020-09-06 17:00:00    765   txYear_2021

我用np.where解决了这个问题

salesReport['Tax_Year'] = np.where(tax_year[0] <= salesReport['date'] and tax_year[1] >= salesReport['date'], tax_year, np.nan)

然而，我无法解决我收到的错误

TypeError: '>=' not supported between instances of 'str' and 'tuple'

此外，我也不确定如何获取变量名，因为目前我将返回实际的元组内容，这不是我想要的

Answer 1

免责声明：

我不擅长熊猫。如果有更好的方法，我不会感到惊讶

我已将元组的tax_years列表转换为字典，并定义了一个独立函数来获取给定datetime对象的纳税年度。实际上，我并不是100%地确定纳税年度结束/开始的时间，因此比较仅在MM-DD-YY上进行，并从数据帧中存在的时间戳中删除时间

import pandas as pd
import numpy as np
import datetime

tax_years = {
    (datetime.datetime(2003, 4, 6), datetime.datetime(2004, 4, 5)): "TY0304",
    (datetime.datetime(2004, 4, 6), datetime.datetime(2005, 4, 5)): "TY0405",
    (datetime.datetime(2005, 4, 6), datetime.datetime(2006, 4, 5)): "TY0506",
    (datetime.datetime(2006, 4, 6), datetime.datetime(2007, 4, 5)): "TY0607",
    (datetime.datetime(2007, 4, 6), datetime.datetime(2008, 4, 5)): "TY0708",
    (datetime.datetime(2008, 4, 6), datetime.datetime(2009, 4, 5)): "TY0809",
    (datetime.datetime(2009, 4, 6), datetime.datetime(2010, 4, 5)): "TY0910",
    (datetime.datetime(2010, 4, 6), datetime.datetime(2011, 4, 5)): "TY1011",
    (datetime.datetime(2011, 4, 6), datetime.datetime(2012, 4, 5)): "TY1112",
    (datetime.datetime(2012, 4, 6), datetime.datetime(2013, 4, 5)): "TY1213",
    (datetime.datetime(2013, 4, 6), datetime.datetime(2014, 4, 5)): "TY1314",
    (datetime.datetime(2014, 4, 6), datetime.datetime(2015, 4, 5)): "TY1415",
    (datetime.datetime(2015, 4, 6), datetime.datetime(2016, 4, 5)): "TY1516",
    (datetime.datetime(2016, 4, 6), datetime.datetime(2017, 4, 5)): "TY1617",
    (datetime.datetime(2017, 4, 6), datetime.datetime(2018, 4, 5)): "TY1718",
    (datetime.datetime(2018, 4, 6), datetime.datetime(2019, 4, 5)): "TY1819",
    (datetime.datetime(2019, 4, 6), datetime.datetime(2020, 4, 5)): "TY1920",
    (datetime.datetime(2020, 4, 6), datetime.datetime(2021, 4, 5)): "TY2021"
}

salesReport  = pd.DataFrame({'date': ['2017-07-02 09:00:00',
                                      '2017-07-03 15:00:00',
                                      '2018-04-05 15:00:00',
                                      '2018-12-20 11:00:00',
                                      '2019-01-06 14:00:00',
                                      '2020-09-06 17:00:00'], 
                            'sales': [100, 339, 98, 1020, 630, 765]})

salesReport["date"] = pd.to_datetime(salesReport["date"])


def get_tax_year(date):
    for (start, end), tax_year in tax_years.items():
        if start.date() <= date.date() <= end.date():
            return tax_year
    return "null"


salesReport["tax_year"] = [get_tax_year(date) for date in salesReport["date"]]
print(salesReport)

以及输出：

                 date  sales tax_year
0 2017-07-02 09:00:00    100   TY1718
1 2017-07-03 15:00:00    339   TY1718
2 2018-04-05 15:00:00     98   TY1718
3 2018-12-20 11:00:00   1020   TY1819
4 2019-01-06 14:00:00    630   TY1819
5 2020-09-06 17:00:00    765   TY2021