instruction.md

###Decorators

#####Part-1. Simple decorator - stringify.

Problem: add, multiply functions return int, but we want it to be str.

Solution: Implement stringify function which is changes return type of the given function to str type and wrap (decorate) add, multiply methods.

To Do:

1. Look at the file stringify.py.

2. Run tests:

    python3 -m unittest tests/test_stringify.py
   

   You will see that it ran 4 tests and all of them FAILED (failures=4)

3. Now, complete that functions in stringify.py.

4. Run tests (step 3) and all of them should be passed.

5. Compare your answer with mine located in answers/stringify.py

6. Commit and push your changes

#####Part-2. Decorator with arguments - registration

Problem: We want to register/unregister subject. Know subject's status (is active or not). Print all active subjects.

Solution: Implement register function which set attribute is_active equals to the is_active param and add it to the registered set if is_active otherwise discard it from registered.

To Do:

1. Look at the file registration.py.

2. Run tests:

    python3 -m unittest tests/test_registration.py
   

   You will see that it ran 11 tests and all of them FAILED (failures=11)

3. Now, complete that functions in registration.py.

4. Run tests (step 3) and all of them should be passed.

5. Compare your answer with mine located in answers/registration.py

6. Commit and push your changes