Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Python: Compute the difference between two lists

Python List: Exercise - 52 with Solution

Write a Python program to compute the difference between two lists.

Python: Compute the difference between two lists

Sample Solution :-

Python Code :

from collections import Counter
color1 = ["red", "orange", "green", "blue", "white"]
color2 = ["black", "yellow", "green", "blue"]
counter1 = Counter(color1)
counter2 = Counter(color2)
print("Color1-Color2: ",list(counter1 - counter2))
print("Color2-Color1: ",list(counter2 - counter1))

Sample Output: 

Color1-Color2:  ['red', 'white', 'orange']                                                                    
Color2-Color1:  ['black', 'yellow']

Flowchart:

Flowchart: Compute the difference between two lists

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to split a list every Nth element.
Next: Write a Python program to create a list with infinite elements.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



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