Question: 
Write a function to calculate the sum of the positive numbers of a given list of numbers using lambda function.


Model's Code:
def sum_positivenum(numbers):
    return sum(filter(lambda x: x > 0, numbers))



Sample Correct Code:
def sum_positivenum(nums):
  sum_positivenum = list(filter(lambda nums:nums>0,nums))
  return sum(sum_positivenum)


Asserts:
assert sum_positivenum([2, 4, -6, -9, 11, -12, 14, -5, 17])==48
assert sum_positivenum([10,15,-14,13,-18,12,-20])==50
assert sum_positivenum([19, -65, 57, 39, 152,-639, 121, 44, 90, -190])==522


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

Test 870 of 974: 668/870 (76.7816091954023%): success