Python: Merge multiple sorted inputs into a single sorted iterator (over the sorted values) using Heap queue algorithm

Last update on April 01 2025 13:22:07 (UTC/GMT +8 hours)

11. Merge Sorted Inputs

Write a Python program that merges multiple sorted inputs into a single sorted iterator (over the sorted values) using the heap queue algorithm.

Sample Solution:

Python Code:

import heapq
num1 = [25, 24, 15, 4, 5, 29, 110]
num2 = [19, 20, 11, 56, 25, 233, 154]
num3 = [24, 26, 54, 48]
num1 = sorted(num1)
num2 = sorted(num2)
num3 = sorted(num3)
result = heapq.merge(num1, num2, num3)
print(list(result))

Sample Output:

[4, 5, 11, 15, 19, 20, 24, 24, 25, 25, 26, 29, 48, 54, 56, 110, 154, 233]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to merge multiple sorted lists into a single sorted iterator using heapq.merge and then output the merged sequence.
• Write a Python script to combine several sorted arrays into one sorted list by leveraging heapq.merge and print the final result.
• Write a Python program to implement a function that merges sorted iterators from different sources using heapq and returns the combined sorted iterator.
• Write a Python function to merge sorted data from multiple files using heapq.merge and then display the merged output.

Python Code Editor:

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