Counter in Python

from collections import Counter

nums = [1, 1, 1, 2, 2, 3]
count = Counter(nums)
print(count)  # Output: Counter({1: 3, 2: 2, 3: 1})

word = "banana"
char_count = Counter(word)
print(char_count)  # Output: Counter({'a': 3, 'n': 2, 'b': 1})

print(count[1])  # Output: 3
print(count[2])  # Output: 2
print(count[5])  # Output: 0 (returns 0 instead of KeyError)

nums = [1, 1, 1, 2, 2, 3]
count = Counter(nums)
print(count.most_common(2))  # Output: [(1, 3), (2, 2)]

count_dict = dict(count)
print(count_dict)  # Output: {1: 3, 2: 2, 3: 1}

a = Counter("hello")
b = Counter("world")
print(a + b)  # Output: Counter({'l': 5, 'o': 2, 'h': 1, 'e': 1, 'w': 1, 'r': 1, 'd': 1})

a.subtract(b)
print(a)  # Output: Counter({'l': 3, 'h': 1, 'e': 1, 'o': 0, 'w': -1, 'r': -1, 'd': -1})