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Python – Round Off Dictionary Values to K decimals

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  • Last Updated : 01 Aug, 2020

Given Dictionary with float values perform round off to K of all the values.

Input : {“Gfg” : 54.684034, “is” : 76.324334, “Best” : 28.43524}, K = 2
Output : {“Gfg” : 54.68, “is” : 76.32, “Best” : 28.43}
Explanation : Values rounded till 2.

Input : {“Gfg” : 54.684034, “is” : 76.324334, “Best” : 28.43524}, K = 1
Output : {“Gfg” : 54.6, “is” : 76.3, “Best” : 28.4}
Explanation : Values rounded till 1.

Method #1 : Using loop + round()

This is one of the ways in which this task can be performed. In this, we iterate for all the values, and perform round off to nearest K values using round().

Python3




# Python3 code to demonstrate working of 
# Round Off Dictionary Values to K decimals
# Using loop + round()
  
# initializing dictionary
test_dict = {"Gfg" : 54.684034, "is" : 76.324334, "Best" : 28.43524}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# initializing K 
K = 3
  
# loop to iterate for values 
res = dict()
for key in test_dict:
      
    # rounding to K using round()
    res[key] = round(test_dict[key], K)
  
# printing result 
print("Values after round off : " + str(res)) 

Output

The original dictionary is : {'Gfg': 54.684034, 'is': 76.324334, 'Best': 28.43524}
Values after round off : {'Gfg': 54.684, 'is': 76.324, 'Best': 28.435}

Method #2 : Using dictionary comprehension + round()

This is yet another way in which this task can be performed. In this we performed similar task using above functionality, the difference being usage of dictionary comprehension to provide one-line solution.

Python3




# Python3 code to demonstrate working of 
# Round Off Dictionary Values to K decimals
# Using dictionary comprehension + round()
  
# initializing dictionary
test_dict = {"Gfg" : 54.684034, "is" : 76.324334, "Best" : 28.43524}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# initializing K 
K = 3
  
# Encapsulating solution using single comprehension
res = {key : round(test_dict[key], K) for key in test_dict}
  
# printing result 
print("Values after round off : " + str(res)) 

Output

The original dictionary is : {'Gfg': 54.684034, 'is': 76.324334, 'Best': 28.43524}
Values after round off : {'Gfg': 54.684, 'is': 76.324, 'Best': 28.435}


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