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

7 votes164 views2 answers
What is the output of the following code? np.arange(0,22,6)
Python
0 vote163 views1 answer
Assert vs validate in python
Python
0 vote164 views1 answer
Pyttx3
Python
14 votes178 views4 answers
Pandas get index of max value in column
Python
22 votes170 views6 answers
How to merge two dataframes
Python
1 vote162 views2 answers
How to add pagination in discord.py
Python
5 votes160 views1 answer
Tf tensor from numpy
Python
0 vote166 views1 answer
Show pythonpath
Python
0 vote152 views1 answer
Atan of number python
Python
0 vote194 views1 answer
Django save object in view
Python Django