I want to copy a 2-d torch tensor to a destination tensor containing only values until the first occurrence of 202 value and zero for the rest of the items like this:
source_t=tensor[[101,2001,2034,1045,202,3454,3453,1234,202]
         ,[101,1999,2808,202,17658,3454,202,0,0]
         ,[101,2012,3832,4027,3454,202,3454,9987,202]]

destination_t=tensor[[101,2001,2034,1045,202,0,0,0,0]
                    ,[101,1999,2808,202,0,0,0,0,0]
                    ,[101,2012,3832,4027,3454,202,0,0,0]]

how can i do it?