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: Find the longest one from any number of iterable objects or objects with a length property

Python List: Exercise - 245 with Solution

Write a Python program to that takes any number of iterable objects or objects with a length property and returns the longest one.

  • Use max() with len() as the key to return the item with the greatest length.
  • If multiple objects have the same length, the first one will be returned.

Sample Solution:

Python Code:

def longest_item(*args):
  return max(args, key = len)
print(longest_item('this', 'is', 'a', 'Green'))  
print(longest_item([1, 2, 3], [1, 2], [1, 2, 3, 4, 5])) 
print(longest_item([1, 2, 3, 4], 'Red'))

Sample Output: 

Green
[1, 2, 3, 4, 5]
[1, 2, 3, 4]

Flowchart:

Flowchart: Find the longest one from any number of iterable objects or objects with a length property.

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 initialize a list containing the numbers in the specified range where start and end are inclusive and the ratio between two terms is step. Returns an error if step equals 1.
Next: Write a Python program to check if a given function returns True for at least one element in the list.

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