I have a pandas dataframe with a column value as index number
Sales
140 100
142 200
145 300
I want to fill the missing index and also want to fill the value of missing index with 0
Sales
140 100
141 0
142 200
143 0
144 0
145 300
I also want to fill missing values as the missing index number like
Week_num
140 140
142 142
145 145
Week_Num
140 140
141 141
142 142
143 143
144 144
145 145
I request you to help me how to code this out?