Counters in Python | Set 2 (Access to counters)

Counters | Python Methods and Functions

After initialization, counters are available in the same way as dictionaries. Also, it does not throw a KeyValue error (if the key is missing), and the counter value is displayed as 0.

Example:

# Python program to demonstrate access to
# Item counter

from collections import Counter

 
# Create list

z = [ 'blue' , ' red' , 'blue' , 'yellow' ,  'blue' , ' red' ]

col_count = Counter (z)

print (col_count)

 

col = [ 'blue' , ' red' , 'yellow' , ' green' ]

 
# There is no green here in col_count
# so the green counter is zero

for color in col:

print (color, col_count [color])

Output:

 Counter ({'blue': 3,' red': 2, 'yellow': 1}) blue 3 red 2 yellow 1 green 0 

elements ():
The elements () method returns an iterator that produces all the elements known to Counter. 
Note: Items with & lt; = 0 are not included.

Example:

# Python example to showcase () elements on
# Counter (returns a list)

from collections import Counter

 

coun = Counter (a = 1 , b = 2 , c = 3 )

print (coun)

  

print ( list (coun.elements ()))

Output:

 Counter ({'c': 3,' b': 2, 'a': 1}) [ 'a',' b', 'b',' c', 'c',' c'] 

most common ():
Most_common () used to get a sequence of the n most common input values ​​and their corresponding values.

# Python example to demonstrate most_elements () on
# Counter

from collections import Counter

 

coun = Counter (a = 1 , b = 2 , c = 3 , d = 120 , e = 1 , f = 219 )

 
# This prints the 3 most common characters

for letter, count in coun.most_common ( 3 ):

print ( '% s:% d' % (letter, count))


Output:

 f: 219 d: 120 c: 3 

This article is updated Mayank Rawata If you love Python.Engineering and would like to contribute, you can also write an article using contribute.python.engineering or by mailing the article [email protected] See my article appearing on the Python.Engineering homepage and help other geeks.

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