Accessing counts associated to each elements [duplicate]
Multi tool use
Accessing counts associated to each elements [duplicate]
This question already has an answer here:
If a have a list of elements with theirs counts as below
[('a', 1), ('b', 2), ('c', 2),('d', 3), ('e', 3)]
And now I want to find out how many of them appear once,twice,and three times.
So the expected output would be something like
1:1,2:2,3:2
The list is generated by the Counter function Counter(lst)
Counter
Counter(lst)
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2 Answers
2
Use another Counter on the values of your first Counter.
Counter
values
Counter
from collections import Counter
s = 'abbccdddeee'
c = Counter(s)
counts = Counter(c.values())
Use collections.Counter again but this time count second element in each tuple.
collections.Counter
from collections import Counter
lst = [('a', 1), ('b', 2), ('c', 2),('d', 3), ('e', 3)]
print(Counter(x[1] for x in lst)) # x[1] takes second element from each tuple.
# Counter({2: 2, 3: 2, 1: 1})
