I have a dataframe as
id status
1 owner
1 retail
1 shop
1 customer
2 owner
2 retail
I created new column of Last status like
id status Last status
1 owner NA
1 retail owner
1 shop retail
1 customer shop
2 owner NA
2 retail owner
But I want to create a column of the flow i.e append last status with the next value like
id status From To
1 owner NA
1 retail owner -> retail
1 shop retail -> shop
1 customer shop -> customer
2 owner NA
2 retail owner -> retail
Big Thanks in advance
Let's do groupby + shift and concatenate with status column:
df['From to'] = df.groupby('id')['status'].shift() + ' -> ' + df['status']
id status From to
0 1 owner NaN
1 1 retail owner -> retail
2 1 shop retail -> shop
3 1 customer shop -> customer
4 2 owner NaN
5 2 retail owner -> retail