当我向 dataframe 添加新列时，它显示为 NaN

Question

So I needed to add the 'count' value to the dataframe as a new column.

I used the below code:

count=HC_Pune.groupby('Customer').size()
HC_Pune.sort_values(by='Customer',inplace=True,ascending=True)
BCP.insert(2,'HC',count,True)
BCP.head(2)

This is the output that I get

Could someone please help me in clearing this problem as to why I am getting NaN for the data?

Answer 1

From the look of your short output,you passed empty values to count which are in turn passed to your dataframe. Take a look at your dataset.