create functions_rafet_taskin.py and decorators_rafet_taskin.py

[rft0]

Describe your changes

Checklist

• I have read the [CONTRIBUTING]
• I have performed a self-review of my own code
• I have run the code locally and it works as expected
• I have commented my code, particularly in hard-to-understand areas

Screenshots (if appropriate)

[canbula]

Solve decorators problem with functools module and remove the assignment statements at the end of the file.

[canbula]

Solve without functools.