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Python: Find the majority element from a given array of size n using Collections module

Python Collections: Exercise-17 with Solution

Write a Python program to find the majority element from a given array of size n using Collections module.

Note: The majority element algorithm finds a majority element, if there is one: that is, an element that occurs repeatedly for more than half of the elements of the input.

Sample Solution:

Python Code:

import collections
class Solution(object):
    def majorityElement(self, nums):
        """
        :type nums: List[int]
        :return type: int
        """
        count_ele=collections.Counter(nums)
        return count_ele.most_common()[0][0]

result = Solution().majorityElement([10,10,20,30,40,10,20,10])
print(result)

Sample Output:

10

Flowchart:

Python Collections: Find the majority element from a given array of size n using Collections module.

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Python: Tips of the Day

Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value:

Example:

def tips_map_values(obj, fn):
  ret = {}
  for key in obj.keys():
    ret[key] = fn(obj[key])
  return ret
users = {
  'Owen': { 'user': 'Owen', 'age': 29 },
  'Eddie': { 'user': 'Eddie', 'age': 15 }
}

print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}

Output:

{'Owen': 29, 'Eddie': 15}