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Python: Combine two given sorted lists using heapq module

Python List: Exercise - 152 with Solution

Write a Python program to combine two given sorted lists using heapq module.

Sample Solution:

Python Code:

from heapq import merge
nums1 = [1, 3, 5, 7, 9, 11]
nums2 = [0, 2, 4, 6, 8, 10]
print("Original sorted lists:")
print(nums1)
print(nums2)
print("\nAfter merging the said two sorted lists:")
print(list(merge(nums1, nums2)))

Sample Output: 

Original sorted lists:
[1, 3, 5, 7, 9, 11]
[0, 2, 4, 6, 8, 10]

After merging the said two sorted lists:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

Flowchart:

Flowchart: Combine two given sorted lists using heapq module.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m