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Python: Determine profiling of Python programs

Python Basic: Exercise-51 with Solution

Write a Python program to determine profiling of Python programs.

Note: A profile is a set of statistics that describes how often and for how long various parts of the program executed. These statistics can be formatted into reports via the pstats module.

Sample Solution:-

Python Code:

import cProfile
def sum():
    print(1+2)
cProfile.run('sum()')

Sample Output:

3                                                                                                             
         5 function calls in 0.000 seconds                                                                    
                                                                                                              
   Ordered by: standard name                                                                                  
                                                                                                              
   ncalls  tottime  percall  cumtime  percall filename:lineno(function)                                       
        1    0.000    0.000    0.000    0.000 7aa14930-2430-11e7-807b-bd9de91b1602.py:2(sum)                  
        1    0.000    0.000    0.000    0.000 <string>:1(<module>)                                            
        1    0.000    0.000    0.000    0.000 {built-in method builtins.exec}                                 
        1    0.000    0.000    0.000    0.000 {built-in method builtins.print}                                
        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}  
	

Flowchart:

Flowchart: Determine profiling of Python programs.

Python Code Editor:

 

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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