计算由字符串和字符串列表的混合值组成的熊猫数据框列中的唯一值

Question

I would like to count the total unique values in a specific column of a data frame. The column looks like the following:

df['column']=([one, two], three, four, [one,five], three])

The desired output would be: 5

I tried df['column'].nunique() but since there are lists in the column it didn't work.

I tried the Counter method in a loop but I was not able to get the total unique count but instead I got unique count per line.

Does anybody know how to solve this?

Answer 1

Here's a way to do:

df['column'].explode().nunique()

5