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Python: Take any number of iterable objects or objects with a length property and returns the longest one

Python Regular Expression: Exercise-56 with Solution

Write a Python program 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('Red', 'Green', 'Black', 'Orange'))
print(longest_item([1, 2, 3], [1, 2, 3, 4], [1, 2, 3, 4, 5]))
print(longest_item([1, 2, 3], 'Java'))
print(longest_item({10, 100}, 'Python'))

Sample Output:

Orange
[1, 2, 3, 4, 5]
Java
Python

Flowchart:

Flowchart: Regular Expression - Take any number of iterable objects or objects with a length property and returns the longest one.

Python Code Editor:

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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