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Python: Add three lists using map function and lambda

Python map: Exercise-2 with Solution

Write a Python program to add three given lists using Python map and lambda.

Sample Solution:

Python Code :

nums1 = [1, 2, 3] 
nums2 = [4, 5, 6] 
nums3 = [7, 8, 9] 
print("Original list: ")
print(nums1)  
print(nums2)  
print(nums3)  
result = map(lambda x, y, z: x + y + z, nums1, nums2, nums3) 
print("\nNew list after adding above three lists:")
print(list(result))

Sample Output:

Original list: 
[1, 2, 3]
[4, 5, 6]
[7, 8, 9]

New list after adding above three lists:
[12, 15, 18]

Python Code Editor:

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Previous: Write a Python program to triple all numbers of a given list of integers. Use Python map.
Next: Write a Python program to listify the list of given strings individually using Python map.

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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