Update Counter collection in python with string, not letter

You can update it with a dictionary, since add another string is same as update the key with count +1:

from collections import Counterc = Counter(['black','blue'])c.update({"red": 1})  c# Counter({'black': 1, 'blue': 1, 'red': 1})

If the key already exists, the count will increase by one:

c.update({"red": 1})c# Counter({'black': 1, 'blue': 1, 'red': 2})

python collections counter

c.update(['red'])>>> cCounter({'black': 1, 'blue': 1, 'red': 1})

Source can be an iterable, a dictionary, or another Counter instance.

Although a string is an iterable, the result is not what you expected. First convert it to a list, tuple, etc.

python collections counter

You can use:

c["red"]+=1# orc.update({"red": 1})# or c.update(["red"])

All these options will work regardless of the key being present or not. And if present, they will increase the count by 1

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