Python 如何合并熊猫系列并添加公共值

我有两个Pandas系列（

Pandas.core.series.series

），我希望将它们合并为一个系列，并在公共键上添加如下值：

series1:
AAA Championship Car season                                       1
Act of Parliament of Ontario                                      1
Act of Parliament of the United Kingdom                          18
Act of Parliament of the United Kingdom election law              1

+

=

---

您可以使用

pandas.Series.sum（）

这也提供了一种填充缺失值的方法

例如，您的代码可以是

series3 = series1.add(series2, fill_value=0)

---

让我们用

sum

尝试

pd.concat

：

series3 = pd.concat([series1,series2]).sum(level=0)

输出：

0
AAA Championship Car season                              1
ATP Buenos Aires                                         1
ATP World Tour Finals                                    1
Act of Parliament of British Columbia                    1
Act of Parliament of Ontario                             1
Act of Parliament of the United Kingdom                 36
Act of Parliament of the United Kingdom election law     2
Name: 1, dtype: int64

full_df = (
    pd.concat([series1, series2], axis = 0)
      .groupby(level=0)
      .sum()
)

series3 = pd.concat([series1,series2]).sum(level=0)

0
AAA Championship Car season                              1
ATP Buenos Aires                                         1
ATP World Tour Finals                                    1
Act of Parliament of British Columbia                    1
Act of Parliament of Ontario                             1
Act of Parliament of the United Kingdom                 36
Act of Parliament of the United Kingdom election law     2
Name: 1, dtype: int64