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 lengths of a list of non-empty strings

Python Programming Puzzles: Exercise-14 with Solution

Write a Python program to find the lengths of a given list of non-empty strings.

Input:
['cat', 'car', 'fear', 'center']
Output:
[3, 3, 4, 6]

Input:
['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']
Output:
[3, 3, 7, 5, 2, 4, 0]

Pictorial Presentation:

Python: Find the lengths of a list of non-empty strings.

Sample Solution:

Python Code:

#License: https://bit.ly/3oLErEI
def test(strs):
     return [*map(len, strs)]
strs =  ['cat', 'car', 'fear', 'center']
print("Original strings:")
print(strs)
print("Lengths of the said list of non-empty strings:")
print(test(strs))
strs =  ['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']
print("\nOriginal strings:")
print(strs)
print("Lengths of the said list of non-empty strings:")
print(test(strs))

Sample Output:

Original strings:
['cat', 'car', 'fear', 'center']
Lengths of the said list of non-empty strings:
[3, 3, 4, 6]

Original strings:
['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']
Lengths of the said list of non-empty strings:
[3, 3, 7, 5, 2, 4, 0]

Flowchart:

Flowchart: Python - Find the lengths of a list of non-empty strings.

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: Find the strings in a list, starting with a given prefix.
Next: Find the longest string of a list of strings.

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