[HackerRank-python] Equalize the Array

def equalizeArray(arr):
    # Write your code herepopo
    num_dict = {}
    
    for i in arr:
        if num_dict.get(i):
            num_dict[i] += 1
        else:
            num_dict[i] = 1
            
    key_value = sorted(num_dict.items(), key = lambda x: x[1], reverse = True)[0][0]
    k_num = arr.count(key_value)
    
    return len(arr) - k_num