How can I use the decorators in this code

Question

https://code.sololearn.com/c4ZIwg5JL7JQ/?ref=app

Answer 1

Which decorators? What are they supposed to do in the code?

Answer 2

Decorators are used to modify functions. Which function do you want to modify?

Read about decorators:
https://pythonbasics.org/decorators/

Answer 3

There is no user defined function in your code.
What are the existing input / function, and the expected output?

======
Some Text
======

You example Some Text can be any text.
Is it the Exponents Chart, or the printed formula?

Answer 4

Bob_Li
I'm already thinking about adding a random function to the decorator.
Instead of using * to draw the line, it can randomly picking from other symbols (string.punctuation).

Answer 5

Wong Hei Ming
It is surprising that random is only called once...

ok, this works:
move the symbol and selected to the inner function
also, I used random.choice. it is more suitable for the task.

def addtitle(func):
def newFunc(args):
symbol = string.punctuation
selected = random.choice(symbol)
... rest of the code ...

Answer 6

Wong Hei Ming
no need for
selected = selected[0]
random.choice returns a single item from the list.

Answer 7

Bob_Li
Of course.
No point in selecting the first character from a string with a length of one.
Forgot to review the code......

Answer 8

Decorator the one we use to add lines designs etc in python like
======
Some text
======

Answer 9

going on a tangent here, but this is nice for superscripts...

https://code.sololearn.com/cN6Ngfy6118a/?ref=app

Answer 10

Exponets Chart

Answer 11

P A Arrchith Iyer
I guess you are looking for something like this?
It is my first time to write a function with decorator, took me 10+ times trial and error.
https://code.sololearn.com/c2E5qoJGrEzp/?ref=app

Answer 12

Wong Hei Ming
very nice.
yes, decorators with arguments are trickier.

it is easier to just directly make the original function fancier

Answer 13

Other than fancy displays, decorators can also be used to provide extended functionalities for the decorated function.
Example for this is the extensive use of decorators in Flask apps.

But I sometimes feel we end up building a tall tower of code stacked on top of one another. The dependency can become tightly coupled.

Answer 14

Bob_Li
Your assistance is required.
I added the random feature inside the decorator, but the symbol doesn't change on the next runs.
I assume following runs call exponents(), and it calls the decorator and select a new symbol again.
https://code.sololearn.com/cIEqlOJinZ2Z/?ref=app

Answer 15

Bob_Li
Thanks, it works now.
Lesson learned.
Decorator need a wrapper function to do the "add-on", thus all codes related with adding stuff must be placed inside the wrapper function.
https://code.sololearn.com/ck7wSYucdF9e/?ref=app