Collections counter

# importing the collections module
import collections
# intializing the arr
arr = [1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3]
# getting the elements frequencies using Counter class
elements_count = collections.Counter(arr)
# printing the element and the frequency
for key, value in elements_count.items():
   print(f"{key}: {value}")

Source: tutorialspoint.com

Python counter

sum(c.values())                 # total of all counts
c.clear()                       # reset all counts
list(c)                         # list unique elements
set(c)                          # convert to a set
dict(c)                         # convert to a regular dictionary
c.items()                       # convert to a list of (elem, cnt) pairs
Counter(dict(list_of_pairs))    # convert from a list of (elem, cnt) pairs
c.most_common()[:-n-1:-1]       # n least common elements
c += Counter()                  # remove zero and negative counts

Source: docs.python.org

Similar codes

4 votes369 views1 answer
How to find the last item of a list
Python
0 vote333 views1 answer
Convert tensorflow checkpoint to pytorch
Python
14 votes340 views2 answers
Pyhon sort a list of tuples
Python
2 votes334 views1 answer
How to save bulk create in django
Python
0 vote343 views1 answer
Use python3.7 as default
Python
1 vote331 views1 answer
AttributeError: 'NoneType' object has no attribute 'initialize_on_transport'
Python
0 vote337 views1 answer
Python compine multiple lists
Python
23 votes340 views3 answers
Install django rest_framework
Python
2 votes375 views1 answer
Pathlib path get directory of current file
Python
1 vote368 views3 answers
Exponential python
Python