Python: Find the minimum even value and its index from a given array of numbers
Python Programming Puzzles: Exercise-46 with Solution
Given an array of numbers representing a branch on a binary tree, write a Python program to find the minimum even value and its index. In the case of a tie, return the smallest index. If there are no even numbers, the answer is [].
Input: [1, 9, 4, 6, 10, 11, 14, 8] Output: Minimum even value and its index of the said array of numbers: [4, 2] Input: [1, 7, 4, 4, 9, 2] Output: Minimum even value and its index of the said array of numbers: [2, 5] Input: [1, 7, 7, 5, 9] Output: Minimum even value and its index of the said array of numbers: []
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums):
if any(n % 2 == 0 for n in nums):
return min([v, i] for i, v in enumerate(nums) if v % 2 == 0)
else:
return []
nums = [1, 9, 4, 6, 10, 11, 14, 8]
print("Original list:")
print(nums)
print("Minimum even value and its index of the said array of numbers:")
print(test(nums))
nums = [1, 7, 4, 4, 9, 2]
print("Original list:")
print(nums)
print("Minimum even value and its index of the said array of numbers:")
print(test(nums))
nums = [1, 7, 7, 5, 9]
print("Original list:")
print(nums)
print("Minimum even value and its index of the said array of numbers:")
print(test(nums))
Sample Output:
Original list: [1, 9, 4, 6, 10, 11, 14, 8] Minimum even value and its index of the said array of numbers: [4, 2] Original list: [1, 7, 4, 4, 9, 2] Minimum even value and its index of the said array of numbers: [2, 5] Original list: [1, 7, 7, 5, 9] Minimum even value and its index of the said array of numbers: []
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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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