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 vote304 views1 answer
How yo import python lib
Python
18 votes338 views4 answers
Matplotlib histogram
Python
14 votes339 views2 answers
How to convert csv to excel in python
Python
4 votes313 views1 answer
Beuatiful soup find a href
Python
4 votes272 views1 answer
Datetime has no attribute now
Python
0 vote356 views2 answers
Python def example
Python
0 vote355 views1 answer
Boto3 with aws profile
Python
0 vote304 views1 answer
How to open html file in python
Python
0 vote381 views2 answers
How to return a missing element in python
Python
1 vote321 views2 answers
Python cmd colors
Python