dummy.txt

1. why __init__.py is empty in each directory
https://stackoverflow.com/questions/30323607/why-do-i-have-to-add-a-blank-init-py-file-to-import-from-subdirectories

If there is not any __init__.py then we can't use __file__ in that directory

2. what is blueprint
https://exploreflask.com/en/latest/blueprints.html#:~:text=A%20blueprint%20defines%20a%20collection,be%20applied%20to%20an%20application.&text=This%20blueprint%20would%20define%20the,be%20served%20on%20those%20routes.

3. __name__
https://www.geeksforgeeks.org/__name__-special-variable-python/

4. __file__
https://www.geeksforgeeks.org/__file__-a-special-variable-in-python/?ref=rp

5. *args and **kwargs in python
https://www.geeksforgeeks.org/args-kwargs-python/

6. __len__
https://www.geeksforgeeks.org/internal-working-of-the-len-function-in-python/

>>> class TheHobbit:
...     def __len__(self):
...         return 95022
...
>>> the_hobbit = TheHobbit()
>>> len(the_hobbit)
95022

__len__ can be modified explicitly which is ot recommended


7. type check in python
http://stackoverflow.com/questions/152580/whats-the-canonical-way-to-check-for-type-in-python

8. does python use duck typing


9. @wraps
https://stackoverflow.com/questions/308999/what-does-functools-wraps-do
https://www.geeksforgeeks.org/python-functools-wraps-function/

10. @decorators
https://www.programiz.com/python-programming/decorator