Question: 
Write a function to find the top k integers that occur most frequently from given lists of sorted and distinct integers using heap queue algorithm.


Model's Code:
def func(lists, k):
    from collections import Counter
    import heapq

    counter = Counter()
    for lst in lists:
        counter.update(lst)

    return [item[0] for item in heapq.nlargest(k, counter.items(), key=lambda x: x[1])]



Sample Correct Code:
def func(nums, k):
    import collections
    d = collections.defaultdict(int)
    for row in nums:
        for i in row:
            d[i] += 1
    temp = []
    import heapq
    for key, v in d.items():
        if len(temp) < k:
            temp.append((v, key))
            if len(temp) == k:
                heapq.heapify(temp)
        else:
            if v > temp[0][0]:
                heapq.heappop(temp)
                heapq.heappush(temp, (v, key))
    result = []
    while temp:
        v, key = heapq.heappop(temp)
        result.append(key)
    return result


Asserts:
assert func([[1, 2, 6], [1, 3, 4, 5, 7, 8], [1, 3, 5, 6, 8, 9], [2, 5, 7, 11], [1, 4, 7, 8, 12]],3)==[5, 7, 1]
assert func([[1, 2, 6], [1, 3, 4, 5, 7, 8], [1, 3, 5, 6, 8, 9], [2, 5, 7, 11], [1, 4, 7, 8, 12]],1)==[1]
assert func([[1, 2, 6], [1, 3, 4, 5, 7, 8], [1, 3, 5, 6, 8, 9], [2, 5, 7, 11], [1, 4, 7, 8, 12]],5)==[6, 5, 7, 8, 1]


Tests:
Test 1 of 3: FAIL: AssertionError()

Test 31 of 974: 24/31 (77.41935483870968%): failed