[python] How to add or increment single item of the Python Counter class

How to add or increment single item of the Python Counter class

How to add or increment single item of the Python Counter class

python 에서  Counter 증가시키명서 리스트 적용하기. 

>>> c = collections.Counter(a=23, b=-9)

#You can add a new element and set its value like this:

>>> c['d'] = 8
>>> c
Counter({'a': 23, 'd': 8, 'b': -9})


#Increment:

>>> c['d'] += 1
>>> c
Counter({'a': 23, 'd': 9, 'b': -9} 


#Note though that c['b'] = 0 does not delete:

>>> c['b'] = 0
>>> c
Counter({'a': 23, 'd': 9, 'b': 0})


#To delete use del:

>>> del c['b']
>>> c
Counter({'a': 23, 'd': 9})
Counter is a dict subclass