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:
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]
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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
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