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Python: Get the frequency of the elements in a list

Python List: Exercise - 30 with Solution

Write a Python program to get the frequency of the elements in a list.

Python: Get the frequency of the elements in a list

Sample Solution:-

Python Code:

import collections
my_list = [10,10,10,10,20,20,20,20,40,40,50,50,30]
print("Original List : ",my_list)
ctr = collections.Counter(my_list)
print("Frequency of the elements in the List : ",ctr)

Sample Output: 

Original List :  [10, 10, 10, 10, 20, 20, 20, 20, 40, 40, 50, 50, 30]                                         
Frequency of the elements in the List :  Counter({10: 4, 20: 4, 40: 2, 50: 2, 30: 1})

Flowchart:

Flowchart: Get the frequency of the elements in a list

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Previous: Write a Python program to get unique values from a list.
Next: Write a Python program to count the number of elements in a list within a specified range.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m