Python: Determine the direction ('increasing' or 'decreasing') of monotonic sequence numbers
Python Programming Puzzles: Exercise-20 with Solution
Monotonic sequences are sequences, which constantly increase or constantly decrease.
Write a Python program to determine the direction ('increasing' or 'decreasing') of monotonic sequence numbers.
Input: [1, 2, 3, 4, 5, 6] Output: Increasing. Input: [6, 5, 4, 3, 2, 1] Output: Decreasing. Input: [19, 19, 5, 5, 5, 5, 5] Output: Not a monotonic sequence!
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums):
return "Increasing." if all(nums[i] < nums[i + 1] for i in range(len(nums) - 1)) else \
"Decreasing." if all(nums[i + 1] < nums[i] for i in range(len(nums) - 1)) else \
"Not a monotonic sequence!"
nums = [1,2,3,4,5,6]
print("Original list:")
print(nums)
print("Check the direction ('increasing' or 'decreasing') of the said list:")
print(test(nums))
nums = [6,5,4,3,2,1]
print("\nOriginal list:")
print(nums)
print("Check the direction ('increasing' or 'decreasing') of the said list:")
print(test(nums))
nums = [19,19,5,5,5,5,5]
print("\nOriginal list:")
print(nums)
print("Check the direction ('increasing' or 'decreasing') of the said list:")
print(test(nums))
Sample Output:
Original list: [1, 2, 3, 4, 5, 6] Check the direction ('increasing' or 'decreasing') of the said list: Increasing. Original list: [6, 5, 4, 3, 2, 1] Check the direction ('increasing' or 'decreasing') of the said list: Decreasing. Original list: [19, 19, 5, 5, 5, 5, 5] Check the direction ('increasing' or 'decreasing') of the said list: Not a monotonic sequence!
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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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