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Python – Resolve Float Keys in Dictionary

  • Last Updated : 01 Aug, 2020

Given a dictionary with variety of floating-point keys, find a way to access them as single value.

Input : test_dict = {“010.78” : “Gfg”, “9.0” : “is”, “10” : “Best”}, K = “09.0”
Output : “is”
Explanation : 09.0 -> 9.0 whose value is “is”.

Input : test_dict = {“010.78” : “Gfg”, “9.0” : “is”, “10” : “Best”}, K = “10.0”
Output : “Best”
Explanation : 10.0 -> 10 whose value is “Best”.

Method #1 : Using float() + loop

This is one of the ways to solve this problem. In this, strategy used is to convert key into float value using float(), it resolves to single value, and perform check of input string after conversion to float(), both resolve to common float value.



Python3




# Python3 code to demonstrate working of 
# Resolve Float Keys in Dictionary
# Using float() + loop()
  
# initializing dictionary
test_dict = {"010.78" : "Gfg", "9.0" : "is", "10" : "Best"}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# initializing K 
K = "10.78"
  
# performing resolution
res = dict()
for key in test_dict:
    res[float(key)] = test_dict[key]
  
# converting compare value to float 
convK = float(K)
  
# performing value access 
res = res[convK]
  
# printing result 
print("Value of resolved float Key : " + str(res)) 
Output
The original dictionary is : {'010.78': 'Gfg', '9.0': 'is', '10': 'Best'}
Value of resolved float Key : Gfg

Method #2 : Using dictionary comprehension + float()

This computes in similar way as above method. The difference being for conversion one liner dictionary comprehension is employed.

Python3




# Python3 code to demonstrate working of 
# Resolve Float Keys in Dictionary
# Using dictionary comprehension + float()
  
# initializing dictionary
test_dict = {"010.78" : "Gfg", "9.0" : "is", "10" : "Best"}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# initializing K 
K = "10.78"
  
# performing resolution using dictionary comprehension
res = {float(key) : test_dict[key] for key in test_dict}
  
# converting compare value to float 
convK = float(K)
  
# performing value access 
res = res[convK]
  
# printing result 
print("Value of resolved float Key : " + str(res)) 
Output
The original dictionary is : {'010.78': 'Gfg', '9.0': 'is', '10': 'Best'}
Value of resolved float Key : Gfg

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