Python counting dictionary

Python ordereddict

>>> # regular unsorted dictionary
>>> d = {'banana': 3, 'apple': 4, 'pear': 1, 'orange': 2}

>>> # dictionary sorted by key
>>> OrderedDict(sorted(d.items(), key=lambda t: t[0]))
OrderedDict([('apple', 4), ('banana', 3), ('orange', 2), ('pear', 1)])

>>> # dictionary sorted by value
>>> OrderedDict(sorted(d.items(), key=lambda t: t[1]))
OrderedDict([('pear', 1), ('orange', 2), ('banana', 3), ('apple', 4)])

>>> # dictionary sorted by length of the key string
>>> OrderedDict(sorted(d.items(), key=lambda t: len(t[0])))
OrderedDict([('pear', 1), ('apple', 4), ('orange', 2), ('banana', 3)])

Source: docs.python.org

Python counting dictionary

counts = dict()
for i in items:
  counts[i] = counts.get(i, 0) + 1

Counter most_common

most_common([n])¶
Return a list of the n most common elements and their counts from the most common to the least. If n is omitted or None, most_common() returns all elements in the counter.
Elements with equal counts are ordered arbitrarily:

>>> Counter('abracadabra').most_common(3)
[('a', 5), ('r', 2), ('b', 2)]

Source: docs.python.org

Similar codes

1 vote172 views3 answers
Management commands django
Python Django
22 votes125 views4 answers
Python get date next week
Python
0 vote130 views1 answer
Series object has no attribute split
Python
1 vote142 views1 answer
Install chromedriver ubuntu python
Python
0 vote134 views1 answer
Add header info in django response
Python
2 votes133 views4 answers
How to add column to np array
Python
1 vote97 views1 answer
Get time taken to run python
Python
11 votes122 views2 answers
Python functions with input
Python
0 vote158 views1 answer
Setting python2 in the path for npm install
Python
1 vote140 views1 answer
How to find the speed of a python program
Python