# File: bastion-example-2.py

import Bastion

class Sample:
    value = 0

    def _set(self, value):
        self.value = value

    def setvalue(self, value):
        if 10 < value <= 20:
            self._set(value)
        else:
            raise ValueError, "illegal value"

    def getvalue(self):
        return self.value

#
# try it

def is_public(name):
    return name[:3] != "get"

s = Bastion.Bastion(Sample(), is_public)
s._set(100) # this works
print s.getvalue() # but not this