python如何使用merge实现堆

import heapq
import random
 
 
random.seed(2016)
 
data = []
for i in range(4):
    new_data = list(random.sample(range(1, 101), 5))
    new_data.sort()
    data.append(new_data)
 
for i, d in enumerate(data):
    print('{}: {}'.format(i, d))
 
print('\nMerged:')
for i in heapq.merge(*data):
    print(i, end=' ')
print()
 
# output
# 0: [33, 58, 71, 88, 95]
# 1: [10, 11, 17, 38, 91]
# 2: [13, 18, 39, 61, 63]
# 3: [20, 27, 31, 42, 45]
#
# Merged:
# 10 11 13 17 18 20 27 31 33 38 39 42 45 58 61 63 71 88 91 95