Python | Minimum value keys in Dictionary

Difficulty Level : Basic
Last Updated : 11 Jul, 2019

Many times, we may have problem in which we require to find not just the value, but the corresponding keys to the minimum value in the entire dictionary. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using min() + list comprehension + values()
The combination of above functions can be used to perform this particular task. In this, minimum value is extracted using the min function, while values of dictionary is extracted using values(). The list comprehension is used to iterate through the dictionary for matching keys with min value.

# Python3 code to demonstrate working of
# Finding min value keys in dictionary
# Using min() + list comprehension + values()
  
# initializing dictionary
test_dict = {'Gfg' : 11, 'for' : 2, 'CS' : 11, 'geeks':8, 'nerd':2}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# Using min() + list comprehension + values()
# Finding min value keys in dictionary
temp = min(test_dict.values())
res = [key for key in test_dict if test_dict[key] == temp]
  
# printing result 
print("Keys with minimum values are : " + str(res))

Output:

The original dictionary is : {‘nerd’: 2, ‘Gfg’: 11, ‘geeks’: 8, ‘CS’: 11, ‘for’: 2}
Keys with minimum values are : [‘nerd’, ‘for’]

Method #2 : Using all() + list comprehension
This task can also be performed using list comprehension and all function. In this, we take all the elements values, using all function that are greater than values with keys and return the keys with smallest values using list comprehension.

# Python3 code to demonstrate working of
# Finding min value keys in dictionary
# Using all() + list comprehension
  
# initializing dictionary
test_dict = {'Gfg' : 1, 'for' : 2, 'CS' : 1}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# Using all() + list comprehension
# Finding min value keys in dictionary
res =  [key for key in test_dict if 
        all(test_dict[temp] >= test_dict[key]
        for temp in test_dict)]
  
# printing result 
print("Keys with minimum values are : " + str(res))

Output:

The original dictionary is : {‘Gfg’: 1, ‘CS’: 1, ‘for’: 2}
Keys with minimum values are : [‘Gfg’, ‘CS’]

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes

Related Articles