Benchmark decorator

usefull_decorators.py

import datetime
import logging
import importlib
import os
import traceback
import time
from timeit import default_timer as timer

def command_decorator(logger_obj):

    if not(type(logger_obj) ==  logging.Logger):
        raise Exception('Bad logger object passed')
    else:
        out_func = logger_obj.debug
    
    def real_decorator(function):

        def wrapped_function(*func_args, **func_kargs):
            out_func('function args: %s' % str(func_args))
            out_func('Starting...')

            v = None
            start = timer()
            try:
                v = function(*func_args, **func_kargs)
                spent = timer() - start
                out_func('Spent %.5f seconds' % spent)
                out_func('Finished!')
            except Exception as e:
                out_func(e)
                out_func(traceback.format_exc())
                spent = timer() - start
                out_func('Spent %.5f seconds' % spent)
            finally:
                return v

        return wrapped_function

    return real_decorator

Ussage.py

from usefull_decorators import command_decorator

logger = logging.getLogger('Command')
logger.setLevel(logging.DEBUG)
logger.addHandler(logging.StreamHandler())

# decorator needs a logger object
@command_decorator(logger)
def f_example(a):
    print("managing proces... with args: %s" %(a))
    time.sleep(2)
    return(3 * a)
    
f_example(2)

This Decorator is used to take measure of lapsed seconds spent executing a function and send output to a logging object.