获取唯一值行明智？

Question

我有一个column，不同的活动由,分隔

Activities

Bathing the puppy, cooking for family
cooking for family, cooking for family
morning walk, cooking for family, Bathing the puppy
Bathing the puppy, Bathing the puppy,Bathing the puppy

如何创建一个单独的column，其中包含每行不同活动的计数。

我希望输出如下：

Activities                                                  Unique Activities

Bathing the puppy, cooking for family                         2
cooking for family, cooking for family                        1
morning walk, cooking for family, Bathing the puppy           3
Bathing the puppy, Bathing the puppy,Bathing the puppy        1

我在pandas 中尝试了nunique 方法，但这适用于整个列，而不是在每一行中给我不同的值。

Answer 1

在一个实际示例中，您可能需要处理大小写和标点符号问题。在nunique 中指定axis=1，以便它跨行运行。

df['Unique Activities'] = df.Activities.str.split(r',\s?', expand=True).nunique(1)

输出：

                                               Activities  Unique Activities
0                   Bathing the puppy, cooking for family                  2
1                  cooking for family, cooking for family                  1
2     morning walk, cooking for family, Bathing the puppy                  3
3  Bathing the puppy, Bathing the puppy,Bathing the puppy                  1