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 vote107 views1 answer
How to implement dfa in python
Python
0 vote91 views1 answer
Not to display column tree odoo 8
Python
4 votes59 views1 answer
Telegram bot send file
Python
0 vote111 views1 answer
Pandas plot date histogram
Python
0 vote92 views1 answer
Xlabel font type matplotlib
Python
0 vote103 views1 answer
Untrack local changes
Python
89 votes98 views6 answers
Sleep python
Python
0 vote98 views1 answer
How do i select a range of columns by index
Python
0 vote108 views1 answer
Matplotlib matrix plot
Python
2 votes137 views2 answers
Add time to datetime python
Python