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

0 vote198 views1 answer
Django admin readonly models
Python Django
1 vote439 views1 answer
How to check which submit button is clicked in flask wtf
Python
0 vote203 views1 answer
Python filter timestamp
Python
0 vote180 views1 answer
Def print_menu(): print{'1. Kilometers to Miles') print{'2. Miles to Kilometers'}
Python
2 votes182 views1 answer
How to autosave in python
Python
0 vote182 views1 answer
Django content type for model
Python
0 vote184 views1 answer
Stemmer nltk
Python
0 vote236 views1 answer
Extends template django file system
Python Django
1 vote146 views1 answer
Importerror no module named 'cffi'
Python
0 vote179 views1 answer
How to get session value in django template
Python