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Python: Find the key of the maximum, minimum value in a dictionary

Python dictionary: Exercise-80 with Solution

Write a Python program to find the key of the maximum value in a dictionary.

  • Use max() with the key parameter set to dict.get() to find and return the key of the maximum value in the given dictionary.
  • Use min() with the key parameter set to dict.get() to find and return the key of the minimum value in the given dictionary.

Sample Solution:

Python Code:

def test(d):
  return max(d, key = d.get), min(d, key = d.get)

students = {
  'Theodore': 19,
  'Roxanne': 22,
  'Mathew': 21,
  'Betty': 20
}
print("\nOriginal dictionary elements:")
print(students)
print("\nFinds the key of the maximum and minimum value of the said dictionary:")
print(test(students))

Sample Output:

Original dictionary elements:
{'Theodore': 19, 'Roxanne': 22, 'Mathew': 21, 'Betty': 20}

Finds the key of the maximum and minimum value of the said dictionary:
('Roxanne', 'Theodore')

Flowchart:

Flowchart: Find the key of the maximum, minimum value in a dictionary.

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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