Question: 
Write a function to get the n largest items from a dataset.


Model's Code:
def larg_nnum(dataset, n):
    return sorted(set(dataset), reverse=True)[:n]



Sample Correct Code:
import heapq
def larg_nnum(list1,n):
 largest=heapq.nlargest(n,list1)
 return largest


Asserts:
assert larg_nnum([10, 20, 50, 70, 90, 20, 50, 40, 60, 80, 100],2)==[100,90]
assert larg_nnum([10, 20, 50, 70, 90, 20, 50, 40, 60, 80, 100],5)==[100,90,80,70,60]
assert larg_nnum([10, 20, 50, 70, 90, 20, 50, 40, 60, 80, 100],3)==[100,90,80]


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 232 of 974: 170/232 (73.27586206896551%): success