python pandas pivot_table count frequency in one column

Question

I am still new to Python pandas\' pivot_table and would like to ask a way to count frequencies of values in one column, which is also linked to another column of ID. The Dat

Answer 1

You need to specify the aggfunc as len:

In [11]: df.pivot_table(index='Account_number', columns='Product', 
                        aggfunc=len, fill_value=0)
Out[11]:
Product         A  B
Account_number
1               2  0
2               1  2
3               1  1

It looks like count, is counting the instances of each column (Account_number and Product), it's not clear to me whether this is a bug...