ShahriyarR

class CustomPasswordEncoder(json.JSONEncoder):
    def default(self, obj):
        try:
            return {"password": obj.get_secret()}
        except AttributeError:
            return super().default(obj)


>>> json.dumps(obj, cls=CustomPasswordEncoder)
Traceback (most recent call last):

ShahriyarR

>>> import json

>>> json.dumps(obj)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.10/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib/python3.10/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python3.10/json/encoder.py", line 257, in iterencode

ShahriyarR

>>> import pickle
>>> pickle.dumps(obj)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/shako/REPOS/py-read-once/.venv/lib/python3.10/site-packages/readonce.py", line 87, in __getstate__
    raise UnsupportedOperationException()
readonce.UnsupportedOperationException: Not allowed on sensitive value

ShahriyarR

>>> obj.secrets
[]
>>> obj._ReadOnce__secrets
[]

ShahriyarR

>>> class FakePassword(Password):
...     ...
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/shako/REPOS/py-read-once/.venv/lib/python3.10/site-packages/readonce.py", line 21, in __new__
    raise TypeError("Subclassing final classes is restricted")
TypeError: Subclassing final classes is restricted

ShahriyarR

>>> obj = Password(password="awesome_password")
>>> obj.add_secret("new_fake_date")
>>> obj.get_secret()
'new_fake_date'
>>> obj.get_secret()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/shako/REPOS/py-read-once/.venv/lib/python3.10/site-packages/readonce.py", line 47, in get_secret
    raise UnsupportedOperationException("Sensitive data was already consumed")
readonce.UnsupportedOperationException: ('Not allowed on sensitive value', 'Sensitive data was already consumed')

ShahriyarR

>>> obj.get_secret()
'awesome_password'
>>> obj.get_secret()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/shako/REPOS/py-read-once/.venv/lib/python3.10/site-packages/readonce.py", line 47, in get_secret
    raise UnsupportedOperationException("Sensitive data was already consumed")
readonce.UnsupportedOperationException: ('Not allowed on sensitive value', 'Sensitive data was already consumed')

ShahriyarR

>>> obj = Password(password="awesome_password")
>>> dir(obj)
[]
>>> obj.__dict__
{}

ShahriyarR

from readonce import ReadOnce


class Password(ReadOnce):
    def __init__(self, password: str) -> None:
        super().__init__()
        self.add_secret(password)

ShahriyarR

from src.main.containers import Container

def create_app() -> Flask:
    container = Container()
    ...