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Python: Find maximum difference pair in a given list

Python Itertools: Exercise-43 with Solution

Write a Python program to find maximum difference pair in a given list.

Sample Solution:

Python Code:

from itertools import combinations
from heapq import nlargest

def test(lst):
    result = nlargest(1, combinations(lst, 2),
               key=lambda sub: abs(sub[0] - sub[1]))
    return result

marks = [32,14,90,10,22,42,31]
print("\nOriginal list:")
print(marks)
print("\nFind maximum difference pair of the said list:")
print(test(marks))

Sample Output:

Original list:
[32, 14, 90, 10, 22, 42, 31]

Find maximum difference pair of the said list:
[(90, 10)]

Python Code Editor:


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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