Python: Find the indexes of numbers, below a given threshold
Python Programming Puzzles: Exercise-11 with Solution
Write a Python program to find the indexes of numbers of a given list below a given threshold.
Input: [(100,(0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55))] Output: [0, 1, 2, 3, 7, 8, 9, 10] Input: [(10,(0, 12, 4, 3, 49, 9, 1, 5, 3))] Output: [0, 2, 3, 5, 6, 7, 8]
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums, n):
return [i for i,n in enumerate(nums) if n<thresh]
nums=[0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55]
thresh = 100
print("Original list:")
print(nums)
print("Threshold: ",thresh)
print("Check the indexes of numbers of the said list below the given threshold:")
print(test(nums, thresh))
nums=[0, 12, 4, 3, 49, 9, 1, 5, 3]
thresh = 10
print("\nOriginal list:")
print(nums)
print("Threshold: ",thresh)
print("Check the indexes of numbers of the said list below the given threshold:")
print(test(nums, thresh))
Sample Output:
Original list: [0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55] Threshold: 100 Check the indexes of numbers of the said list below the given threshold: [0, 1, 2, 3, 7, 8, 9, 10] Original list: [0, 12, 4, 3, 49, 9, 1, 5, 3] Threshold: 10 Check the indexes of numbers of the said list below the given threshold: [0, 2, 3, 5, 6, 7, 8]
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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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