In [1]:

    

from collections import Counter


    

In [2]:

    

a = Counter({2: 3, 3: 4})
a


    

    
Out[2]:





Counter({2: 3, 3: 4})

In [3]:

    

b = Counter({3: 5, 7: 6})
b


    

    
Out[3]:





Counter({3: 5, 7: 6})

In [4]:

    

a + b


    

    
Out[4]:





Counter({2: 3, 3: 9, 7: 6})

In [5]:

    

a - b


    

    
Out[5]:





Counter({2: 3})

In [6]:

    

b - a


    

    
Out[6]:





Counter({3: 1, 7: 6})

In [7]:

    

a | b  # max


    

    
Out[7]:





Counter({2: 3, 3: 5, 7: 6})

In [8]:

    

a & b  # min


    

    
Out[8]:





Counter({3: 4})