Skip to content
Related Articles

Related Articles

Python – Dictionary with maximum count of pairs
  • Last Updated : 02 Sep, 2020

Given dictionary list, extract dictionary with maximum keys.

Input : test_list = [{“gfg”: 2, “best” : 4}, {“gfg”: 2, “is” : 3, “best” : 4, “CS” : 9}, {“gfg”: 2}]
Output : 4
Explanation : 2nd dictionary has maximum keys, 4.

Input : test_list = [{“gfg”: 2, “best” : 4}, {“gfg”: 2}]
Output : 2
Explanation : 1st dictionary has maximum keys, 2.

Method #1 : Using len() + loop

In this, we iterate for each of dictionary and compare lengths of each, record and return one with maximum length.



Python3




# Python3 code to demonstrate working of 
# Dictionary with maximum keys
# Using loop + len()
  
# initializing list
test_list = [{"gfg": 2, "best" : 4}, 
             {"gfg": 2, "is" : 3, "best" : 4}, 
             {"gfg": 2}]
  
# printing original list
print("The original list is : " + str(test_list))
  
res = {} 
max_len = 0
for ele in test_list:
      
    # checking for lengths
    if len(ele) > max_len: 
        res = ele
        max_len = len(ele)
          
# printing results
print("Maximum keys Dictionary : " + str(res))
Output
The original list is : [{'gfg': 2, 'best': 4}, {'gfg': 2, 'is': 3, 'best': 4}, {'gfg': 2}]
Maximum keys Dictionary : {'gfg': 2, 'is': 3, 'best': 4}

Method #2 : Using max() + key=len

In this, we compute maximum length key using max() by passing additional key “len” for comparison based on lengths.

Python3




# Python3 code to demonstrate working of 
# Dictionary with maximum keys
# Using max() + key = len
  
# initializing list
test_list = [{"gfg": 2, "best" : 4}, 
             {"gfg": 2, "is" : 3, "best" : 4}, 
             {"gfg": 2}]
  
# printing original list
print("The original list is : " + str(test_list))
  
# maximum length dict using len param
res = max(test_list, key = len)
          
# printing results
print("Maximum keys Dictionary : " + str(res))
Output
The original list is : [{'gfg': 2, 'best': 4}, {'gfg': 2, 'is': 3, 'best': 4}, {'gfg': 2}]
Maximum keys Dictionary : {'gfg': 2, 'is': 3, 'best': 4}

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.

My Personal Notes arrow_drop_up
Recommended Articles
Page :