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

25 votes65 views7 answers
Remove space from start and end of string in python
Python
0 vote106 views1 answer
Python import multiple csv
Python
5 votes118 views4 answers
Python get last key in dict
Python
2 votes97 views1 answer
Give a function a name python
Python
0 vote78 views2 answers
Initialize boolean list of size python
Python
0 vote99 views1 answer
Global /tmp/pip-req-build-civioau0/opencv/modules/videoio/src/cap_v4l.cpp (587) autosetup_capture_mode_v4l2 VIDEOIO(V4L2:/dev/video0): device is busy
Python
22 votes115 views4 answers
How to remove all characters after a specific character in python?
Python
3 votes190 views4 answers
Python sort multiple keys
Python
8 votes102 views6 answers
Combine to lists python
Python
3 votes112 views3 answers
Tensorflow to numpy
Python