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Python Exercise: Invoke a given function after specific milliseconds

Python Functions: Exercise - 21 with Solution

Write a Python program that invoke a given function after specific milliseconds.

Sample Solution:-

Python Code:

from time import sleep
import math
def delay(fn, ms, *args):
  sleep(ms / 1000)
  return fn(*args)
print("Square root after specific miliseconds:") 
print(delay(lambda x: math.sqrt(x), 100, 16))
print(delay(lambda x: math.sqrt(x), 1000, 100))
print(delay(lambda x: math.sqrt(x), 2000, 25100))

Sample Output: 

Square root after specific miliseconds:
4.0
10.0
158.42979517754858

Flowchart:

Flowchart: Python exercises: Invoke a given function after specific milliseconds.

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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