Python: Single digits in numbers sorted backwards and converted to English words
Python Programming Puzzles: Exercise-96 with Solution
Write a Python program to get the single digits in numbers sorted backwards and converted to English words.
Input: [1, 3, 4, 5, 11] Output: ['five', 'four', 'three', 'one'] Input: [27, 3, 8, 5, 1, 31] Output: ['eight', 'five', 'three', 'one']
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums):
digits = {"zero": None,
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5,
"six": 6,
"seven": 7,
"eight": 8,
"nine": 9}
digits_backwards = {digits[k]: k for k in digits}
digits = [digits[s] for s in digits]
li = [digits[n] for n in nums if n in digits]
return [digits_backwards[n] for n in sorted(li, reverse=True)]
nums = [1, 3, 4, 5, 11]
print("Original list of numbers:")
print(nums)
print("Return the single digits in nums sorted backwards and converted to English words:")
print(test(nums))
nums = [27, 3, 8, 5, 1, 31]
print("\nOriginal list of numbers:")
print(nums)
print("Return the single digits in nums sorted backwards and converted to English words:")
print(test(nums))
Sample Output:
Original list of numbers: [1, 3, 4, 5, 11] Return the single digits in nums sorted backwards and converted to English words: ['five', 'four', 'three', 'one'] Original list of numbers: [27, 3, 8, 5, 1, 31] Return the single digits in nums sorted backwards and converted to English words: ['eight', 'five', 'three', 'one']
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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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