from collections import Counter
strl = "aabbaba"
print(Counter(str1))
Counter({'a': 4, 'b': 3})
>>> from collections import Counter
>>> colors = ['blue', 'blue', 'blue', 'red', 'red']
>>> counter = Counter(colors)
>>> counter['yellow'] += 1
Counter({'blue': 3, 'red': 2, 'yellow': 1})
>>> counter.most_common()[0]
('blue', 3)Counter({'x': 4, 'y': 2, 'z': 2})
sum(c.values()) # total of all counts
c.clear() # reset all counts
list(c) # list unique elements
set(c) # convert to a set
dict(c) # convert to a regular dictionary
c.items() # convert to a list of (elem, cnt) pairs
Counter(dict(list_of_pairs)) # convert from a list of (elem, cnt) pairs
c.most_common()[:-n-1:-1] # n least common elements
c += Counter() # remove zero and negative counts
c = Counter("thiiss wiill caalcullateeee theee numbeeer of characters")
# now when we print c, it will have the following data:
Counter({'e': 11, ' ': 6, 'l': 5, 'a': 5, 't': 4, 'i': 4, 'c': 4, 'h': 3, 's': 3, 'r': 3, 'u': 2, 'w': 1, 'n': 1, 'm': 1, 'b': 1, 'o': 1, 'f': 1})
# And now we can check the occurrence of each of the characters as follows:
count_e = c.get('e') # returns 11