[Erp5-dev] python private var

[bartek]

Hello

I was thining how to store a value in a python object in such a way it
can be used for processing, but can not be retrieved as is, even using
pdb prompt. And I came up with the following:

class PrivateStorage(object):
"""
A class for storing and using variable in such a way that it can
not be retrieved as is, even by someone able to modify source code
or use a pdb prompt.
"""

value = ''

def __get__(self, container, cls):
"""
Return result of processing stored value.
"""
return self.process(container)

def __set__(self, container, value):
self.value = value

def process(self, container):
"""
Implementation method for processing stored value
also using containter attributes.
"""
return self.value == container.v


class Test(object):

priv = PrivateStorage()
v = ''


def main():
t = Test()
t.priv = 'aaa'
print t.priv
print t.__dict__
t.v = 'abc'
print t.priv
t.v = 'aaa'
print t.priv

Do you think it is secure, or is there a way to hack it?

Bartek