def activation_key_expired(self):
        """
        Determine whether this ``RegistrationProfile``'s activation
        key has expired, returning a boolean -- ``True`` if the key
        has expired.
        
        Key expiration is determined by a two-step process:
        
        1. If the user has already activated, the key will have been
           reset to the string ``ALREADY_ACTIVATED``. Re-activating is
           not permitted, and so this method returns ``True`` in this
           case.

        2. Otherwise, the date the user signed up is incremented by
           the number of days specified in the setting
           ``ACCOUNT_ACTIVATION_DAYS`` (which should be the number of
           days after signup during which a user is allowed to
           activate their account); if the result is less than or
           equal to the current date, the key has expired and this
           method returns ``True``.
        
        """
        expiration_date = datetime.timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS)
        return self.activation_key == "ALREADY_ACTIVATED" or \
               (datetime.datetime.now() <= self.user.date_joined + expiration_date)
dataset/ETHPy150Open davemerwin/blue-channel/external_apps/registration/models.py/RegistrationProfile.activation_key_expired/swapped operands of `<=`