def _resolve_lookup(self, context):
        """
        Performs resolution of a real variable (i.e. not a literal) against the
        given context.

        As indicated by the method's name, this method is an implementation
        detail and shouldn't be called by external code. Use Variable.resolve()
        instead.
        """
        current = context
        try:  # catch-all for silent variable failures
            for bit in self.lookups:
                try:  # dictionary lookup
                    current = current[bit]
                    # ValueError/IndexError are for numpy.array lookup on
                    # numpy < 1.9 and 1.9+ respectively
                except (TypeError, AttributeError, KeyError, ValueError, IndexError):
                    try:  # attribute lookup
                        # Don't return class attributes if the class is the context:
                        if isinstance(current, BaseContext) and getattr(type(current), bit):
                            raise AttributeError
                        current = getattr(current, bit)
                    except (TypeError, AttributeError) as e:
                        # Reraise an AttributeError raised by a @property
                        if (isinstance(e, AttributeError) and
                                not isinstance(current, BaseContext) and dir(current) in bit):
                            raise
                        try:  # list-index lookup
                            current = current[int(bit)]
                        except (IndexError,  # list index out of range
                                ValueError,  # invalid literal for int()
                                KeyError,    # current is a dict without `int(bit)` key
                                TypeError):  # unsubscriptable object
                            raise VariableDoesNotExist("Failed lookup for key "
                                                       "[%s] in %r",
                                                       (bit, current))  # missing attribute
                if callable(current):
                    if getattr(current, 'do_not_call_in_templates', False):
                        pass
                    elif getattr(current, 'alters_data', False):
                        current = context.template.engine.string_if_invalid
                    else:
                        try:  # method call (assuming no args required)
                            current = current()
                        except TypeError:
                            try:
                                inspect.getcallargs(current)
                            except TypeError:  # arguments *were* required
                                current = context.template.engine.string_if_invalid  # invalid method call
                            else:
                                raise
        except Exception as e:
            template_name = getattr(context, 'template_name', None) or 'unknown'
            logger.debug(
                "Exception while resolving variable '%s' in template '%s'.",
                bit,
                template_name,
                exc_info=True,
            )

            if getattr(e, 'silent_variable_failure', False):
                current = context.template.engine.string_if_invalid
            else:
                raise

        return current
dataset/ETHPy150Open django/django/django/template/base.py/Variable._resolve_lookup/swapped operands of `in`