Question

我想通过检查它们是否包含相同的文档编号，将一个数据框中的值附加到另一个数据框中。

ip_df：

        CardName     DocNum    DocDate      DocTotal    DocNum2    PaidToDate   Balance
0       CompanyA  800100001 2021-03-01  10000.000000  920000000  10000.000000  0.000000
1       CompanyA  800100002 2021-03-01  20000.000000  920000000  20000.000000  0.000000
2       CompanyA  800100003 2021-03-01  30000.000000  920000000  30000.000000  0.000000
3       CompanyA  800100004 2021-03-01  40000.000000  920000000  40000.000000  0.000000
4       CompanyA  800100005 2021-03-01  50000.000000  920000000  50000.000000  0.000000
..      ...        ...        ...           ...        ...           ...       ...
94      CompanyY  800100006 2021-03-01  60000.000000  920000005  60000.000000  0.000000
95      CompanyY  800100007 2021-03-01  70000.000000  920000005  70000.000000  0.000000
96      CompanyY  800100008 2021-03-01  80000.000000  920000005  80000.000000  0.000000
97      CompanyZ  800100009 2021-03-01  90000.000000  920000006  90000.000000  0.000000
98      CompanyZ  800100010 2021-03-01  11000.000000  920000006  11000.000000  0.000000

[99 rows x 7 columns]

ar_df：

        BPCode       Balance Currency    DueDate  BPName  TransId       Ref1      Payment Received  Bank Charge
0     XXXXXXXX  10000.000000      USD 2020-09-29  CompanyA   503378  800100001          0            0
1     XXXXXXXX  20000.000000      USD 2021-03-01  CompanyA   543103  800100002          0            0
2     XXXXXXXX  30000.000000      USD 2021-03-01  CompanyA   543171  800100003          0            0
3     XXXXXXXX  40000.000000      USD 2021-03-01  CompanyA   544205  800100004          0            0
4     XXXXXXXX  50000.000000      USD 2021-03-01  CompanyA   544222  800100005          0            0
...        ...           ...      ...        ...  ...      ...        ...               ...          ...
3763  XXXXXXXX  60000.000000      USD 2021-03-02  CompanyY   548612  800100006          0            0
3764  XXXXXXXX  70000.000000      USD 2021-03-02  CompanyY   547727  800100007          0            0
3765  XXXXXXXX  80000.000000      USD 2021-03-30  CompanyY   553819  800100008          0            0
3766  XXXXXXXX  90000.000000      USD 2021-04-01  CompanyZ   547707  800100009          0            0
3767  XXXXXXXX  11000.000000      USD 2021-04-29  CompanyZ   556102  800100010          0            0

[3768 rows x 9 columns]

我正在尝试这样做：

for row in ip_df:
if ip_df.row['DocNum'] == ar_df.row['Ref1']:
    ap_df.row['Payment Received'] = ip_df.row['PaidToDate']

但我不太确定这样做的正确方法。

我尝试四处搜索，但大多数情况下，答案似乎总是指向仅检查标量值。

我想要实现的是检查ip_df中是否在一行中，是否可以在ap_df的'Ref1'列中找到'DocNum'，如果为真，则将ap_df的'Payment Received'行设置为来自ip_df's的值PaidToDate' 行。

最终结果应如下所示：

        BPCode       Balance Currency    DueDate  BPName  TransId       Ref1      Payment Received  Bank Charge
0     XXXXXXXX  10000.000000      USD 2020-09-29  CompanyA   503378  800100001          10000.000000 0
1     XXXXXXXX  20000.000000      USD 2021-03-01  CompanyA   543103  800100002          20000.000000 0
2     XXXXXXXX  30000.000000      USD 2021-03-01  CompanyA   543171  800100003          30000.000000 0
3     XXXXXXXX  40000.000000      USD 2021-03-01  CompanyA   544205  800100004          40000.000000 0
4     XXXXXXXX  50000.000000      USD 2021-03-01  CompanyA   544222  800100005          50000.000000 0
...        ...           ...      ...        ...  ...      ...        ...               ...          ...
3763  XXXXXXXX  60000.000000      USD 2021-03-02  CompanyY   548612  800114258          60000.000000 0
3764  XXXXXXXX  70000.000000      USD 2021-03-02  CompanyY   547727  800113975          70000.000000 0
3765  XXXXXXXX  80000.000000      USD 2021-03-30  CompanyY   553819  800115292          80000.000000 0
3766  XXXXXXXX  90000.000000      USD 2021-04-01  CompanyZ   547707  800113957          90000.000000 0
3767  XXXXXXXX  11000.000000      USD 2021-04-29  CompanyZ   556102  800115741          11000.000000 0

[3768 rows x 9 columns]

提前感谢您的帮助！！

Answer 1

在带有 df.merge 的列子集上使用 df.rename：

In [220]: ar_df['Ref1'] = ar_df['Ref1'].str.replace('', np.nan).astype(int)
In [221]: ip_df['DocNum'] = ar_df['DocNum'].str.replace('', np.nan).astype(int)

In [222]: ar_df.merge(ip_df[['DocNum', 'PaidToDate']], left_on='Ref1', right_on='DocNum').drop(['Payment Received', 'DocNum'], 1).rename(columns={'PaidToDate':'Payment Received'})
Out[222]: 
     BPCode  Balance Currency     DueDate    BPName  TransId       Ref1  Bank_Charge  Payment_Received
0  XXXXXXXX  10000.0      USD  2020-09-29  CompanyA   503378  800100001            0           10000.0
1  XXXXXXXX  20000.0      USD  2021-03-01  CompanyA   543103  800100002            0           20000.0
2  XXXXXXXX  30000.0      USD  2021-03-01  CompanyA   543171  800100003            0           30000.0
3  XXXXXXXX  40000.0      USD  2021-03-01  CompanyA   544205  800100004            0           40000.0
4  XXXXXXXX  50000.0      USD  2021-03-01  CompanyA   544222  800100005            0           50000.0

如何根据另一列将数据附加到数据框？

1 个答案: