def as_tuple(self, named=None):
        """
        Create a structured schema that will pass stream tuples into callables as ``tuple`` instances.

        If this instance represents a common schema then it will be returned
        without modification. Stream tuples with common schemas are
        always passed according to their definition.

        **Passing as tuple**

        When `named` evaluates to ``False`` then each stream tuple will
        be passed as a ``tuple``. For example with a structured schema
        of ``tuple<rstring id, float64 value>`` a value is passed as
        ``('TempSensor', 27.4)`` and access to the first attribute
        is ``t[0]`` and the second as ``t[1]`` where ``t`` represents
        the passed value..

        **Passing as named tuple**

        When `named` is ``True`` or a ``str`` then each stream tuple will
        be passed as a named tuple. For example with a structured schema
        of ``tuple<rstring id, float64 value>`` a value is passed as
        ``('TempSensor', 27.4)`` and access to the first attribute
        is ``t.id`` (or ``t[0]``) and the second as ``t.value`` (``t[1]``)
        where ``t`` represents the passed value.

        .. warning:: If an schema's attribute name is not a valid Python identifier or
            starts with an underscore then it will be renamed as positional name ``_n``.
            For example, with the schema ``tuple<int32 a, int32 def, int32 id>`` the
            field names are ``a``, ``_1``, ``_2``.


        The value of `named` is used as the name of the named tuple
        class with ``StreamTuple`` used when `named` is ``True``.

        It is not guaranteed that the class of the namedtuple is the
        same for all callables processing tuples with the same
        structured schema, only that the tuple is a named tuple
        with the correct field names.

        Args:
            named: Pass stream tuples as a named tuple.
                If not set then stream tuples are passed as
                instances of ``tuple``.

        Returns:
            StreamSchema: Schema passing stream tuples as ``tuple`` if allowed.

        .. versionadded:: 1.8
        .. versionadded:: 1.9 Addition of `named` parameter.
        """
        if not named:
            return self._copy(tuple)

        if named == True or isinstance(named, basestring):
            return self._copy(self._make_named_tuple(name=named))

        return self._copy(tuple)
def as_tuple ( self , named = None ) : if not named : return self . _copy ( tuple ) if named == True or isinstance ( named , basestring ) : return self . _copy ( self . _make_named_tuple ( name = named ) ) return self . _copy ( tuple )
Create a structured schema that will pass stream tuples into callables as ``tuple`` instances.

        If this instance represents a common schema then it will be returned
        without modification. Stream tuples with common schemas are
        always passed according to their definition.

        **Passing as tuple**

        When `named` evaluates to ``False`` then each stream tuple will
        be passed as a ``tuple``. For example with a structured schema
        of ``tuple<rstring id, float64 value>`` a value is passed as
        ``('TempSensor', 27.4)`` and access to the first attribute
        is ``t[0]`` and the second as ``t[1]`` where ``t`` represents
        the passed value..

        **Passing as named tuple**

        When `named` is ``True`` or a ``str`` then each stream tuple will
        be passed as a named tuple. For example with a structured schema
        of ``tuple<rstring id, float64 value>`` a value is passed as
        ``('TempSensor', 27.4)`` and access to the first attribute
        is ``t.id`` (or ``t[0]``) and the second as ``t.value`` (``t[1]``)
        where ``t`` represents the passed value.

        .. warning:: If an schema's attribute name is not a valid Python identifier or
            starts with an underscore then it will be renamed as positional name ``_n``.
            For example, with the schema ``tuple<int32 a, int32 def, int32 id>`` the
            field names are ``a``, ``_1``, ``_2``.


        The value of `named` is used as the name of the named tuple
        class with ``StreamTuple`` used when `named` is ``True``.

        It is not guaranteed that the class of the namedtuple is the
        same for all callables processing tuples with the same
        structured schema, only that the tuple is a named tuple
        with the correct field names.

        Args:
            named: Pass stream tuples as a named tuple.
                If not set then stream tuples are passed as
                instances of ``tuple``.

        Returns:
            StreamSchema: Schema passing stream tuples as ``tuple`` if allowed.

        .. versionadded:: 1.8
        .. versionadded:: 1.9 Addition of `named` parameter.