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Python – Dictionary Values Mean
  • Last Updated : 01 Aug, 2020

Given a dictionary, find mean of all the values present.

Input : test_dict = {“Gfg” : 4, “is” : 4, “Best” : 4, “for” : 4, “Geeks” : 4}
Output : 4.0
Explanation : (4 + 4 + 4 + 4 + 4) / 4 = 4.0, hence mean.

Input : test_dict = {“Gfg” : 5, “is” : 10, “Best” : 15}
Output : 10.0
Explanation : Mean of these is 10.0

Method #1 : Using loop + len()

This is brute way in which this task can be performed. In this, we loop through each value and perform summation and then the result is divided by total keys extracted using len().



Python3




# Python3 code to demonstrate working of 
# Dictionary Values Mean
# Using loop + len()
  
# initializing dictionary
test_dict = {"Gfg" : 4, "is" : 7, "Best" : 8, "for" : 6, "Geeks" : 10}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# loop to sum all values 
res = 0
for val in test_dict.values():
    res += val
  
# using len() to get total keys for mean computation
res = res / len(test_dict)
  
# printing result 
print("The computed mean : " + str(res)) 
Output
The original dictionary is : {'Gfg': 4, 'is': 7, 'Best': 8, 'for': 6, 'Geeks': 10}
The computed mean : 7.0

Method #2 : Using sum() + len() + values()

The combination of above functions can be used to solve this problem. In this, we perform summation using sum() and size() of total keys computed using len().

Python3




# Python3 code to demonstrate working of 
# Dictionary Values Mean
# Using sum() + len() + values()
  
# initializing dictionary
test_dict = {"Gfg" : 4, "is" : 7, "Best" : 8, "for" : 6, "Geeks" : 10}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# values extracted using values()
# one-liner solution to problem.
res = sum(test_dict.values()) / len(test_dict)
  
# printing result 
print("The computed mean : " + str(res)) 
Output
The original dictionary is : {'Gfg': 4, 'is': 7, 'Best': 8, 'for': 6, 'Geeks': 10}
The computed mean : 7.0

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