Python Decorators - 1 - Hands On

Python Python Classes and Objects (Article) Python Classes and Objects (Program)

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1. Decorators - 1

1. Define a decorator function log which logs information about a function and the arguments passed to it.

2. Ensure that the log message is written to STDOUT.

3. Use the Test against custom input box to output the result for debugging.

4. Provide a text string (refer test case samples) to display the output/error.

Given Input:

hello world!

Expected Output:

Accessed the function -'greet' with arguments ('hello world!',) {}

Program:

#!/bin/python3
import sys
import os
import datetime as dt

#Add log function and inner function implementation here

def log(func):

    def inner(*args, **kwdargs):

        STDOUT= "Accessed the function -'{}' with arguments {} {}".format(func.__name__,args,kwdargs)

        return STDOUT

    return inner


def greet(msg):

    'Greeting Message : ' + msg

    

greet = log(greet)
    

'''Check the Tail section for input/output'''

if __name__ == "__main__":
    with open(os.environ['OUTPUT_PATH'], 'w') as fout:
        res_lst = list()
        res_lst.append(greet(str(input())))
        fout.write("{}".format(*res_lst))

Output:

Accessed the function -'greet' with arguments ('Python is awesome',) {}

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