How to use the mypy.types.AnyType function in mypy

def visit_namedtuple_expr(self, e: NamedTupleExpr) -> Type:
        # TODO: Perhaps return a type object type?
        return AnyType()

continue
                if specifier.key not in mapping:
                    self.msg.key_not_in_mapping(specifier.key, replacements)
                    return
                rep_type = mapping[specifier.key]
                expected_type = self.conversion_type(specifier.type, replacements)
                if expected_type is None:
                    return
                self.chk.check_subtype(rep_type, expected_type, replacements,
                                       messages.INCOMPATIBLE_TYPES_IN_STR_INTERPOLATION,
                                       'expression has type',
                                       'placeholder with key \'%s\' has type' % specifier.key)
        else:
            rep_type = self.accept(replacements)
            dict_type = self.chk.named_generic_type('builtins.dict',
                                            [AnyType(), AnyType()])
            self.chk.check_subtype(rep_type, dict_type, replacements,
                                   messages.FORMAT_REQUIRES_MAPPING,
                                   'expression has type', 'expected type for mapping is')

def check_getattr_method(self, typ: CallableType, context: Context) -> None:
        method_type = CallableType([AnyType(), self.named_type('builtins.str')],
                                   [nodes.ARG_POS, nodes.ARG_POS],
                                   [None, None],
                                   AnyType(),
                                   self.named_type('builtins.function'))
        if not is_subtype(typ, method_type):
            self.msg.invalid_signature(typ, context)

for t in arg_types):
                self.fail("Ellipses cannot accompany other argument types "
                          "in function type signature", lineno, n.col_offset)
            elif len(arg_types) > len(arg_kinds):
                self.fail('Type signature has too many arguments', lineno, n.col_offset,
                          blocker=False)
            elif len(arg_types) < len(arg_kinds):
                self.fail('Type signature has too few arguments', lineno, n.col_offset,
                          blocker=False)
            else:
                func_type = CallableType([a if a is not None else
                                          AnyType(TypeOfAny.unannotated) for a in arg_types],
                                         arg_kinds,
                                         arg_names,
                                         return_type if return_type is not None else
                                         AnyType(TypeOfAny.unannotated),
                                         _dummy_fallback)

        func_def = FuncDef(n.name,
                       args,
                       self.as_required_block(n.body, lineno),
                       func_type)
        if isinstance(func_def.type, CallableType):
            # semanal.py does some in-place modifications we want to avoid
            func_def.unanalyzed_type = func_def.type.copy_modified()
        if is_coroutine:
            func_def.is_coroutine = True
        if func_type is not None:
            func_type.definition = func_def
            func_type.line = lineno

        if n.decorator_list:

def is_generator_return_type(self, typ: Type, is_coroutine: bool) -> bool:
        """Is `typ` a valid type for a generator/coroutine?

        True if `typ` is a *supertype* of Generator or Awaitable.
        Also true it it's *exactly* AwaitableGenerator (modulo type parameters).
        """
        if is_coroutine:
            # This means we're in Python 3.5 or later.
            at = self.named_generic_type('typing.Awaitable', [AnyType()])
            if is_subtype(at, typ):
                return True
        else:
            gt = self.named_generic_type('typing.Generator', [AnyType(), AnyType(), AnyType()])
            if is_subtype(gt, typ):
                return True
        return isinstance(typ, Instance) and typ.type.fullname() == 'typing.AwaitableGenerator'

def check_reverse_op_method(self, defn: FuncItem, typ: CallableType,
                                method: str) -> None:
        """Check a reverse operator method such as __radd__."""

        # This used to check for some very obscure scenario.  It now
        # just decides whether it's worth calling
        # check_overlapping_op_methods().

        if method in ('__eq__', '__ne__'):
            # These are defined for all objects => can't cause trouble.
            return

        # With 'Any' or 'object' return type we are happy, since any possible
        # return value is valid.
        ret_type = typ.ret_type
        if isinstance(ret_type, AnyType):
            return
        if isinstance(ret_type, Instance):
            if ret_type.type.fullname() == 'builtins.object':
                return
        # Plausibly the method could have too few arguments, which would result
        # in an error elsewhere.
        if len(typ.arg_types) <= 2:
            # TODO check self argument kind

            # Check for the issue described above.
            arg_type = typ.arg_types[1]
            other_method = nodes.normal_from_reverse_op[method]
            if isinstance(arg_type, Instance):
                if not arg_type.type.has_readable_member(other_method):
                    return
            elif isinstance(arg_type, AnyType):

"""Figure out what an unbound type that doesn't refer to a TypeInfo node means.

        This is something unusual. We try our best to find out what it is.
        """
        name = sym.fullname
        if name is None:
            assert sym.node is not None
            name = sym.node.name
        # Option 1:
        # Something with an Any type -- make it an alias for Any in a type
        # context. This is slightly problematic as it allows using the type 'Any'
        # as a base class -- however, this will fail soon at runtime so the problem
        # is pretty minor.
        if isinstance(sym.node, Var):
            typ = get_proper_type(sym.node.type)
            if isinstance(typ, AnyType):
                return AnyType(TypeOfAny.from_unimported_type,
                               missing_import_name=typ.missing_import_name)
        # Option 2:
        # Unbound type variable. Currently these may be still valid,
        # for example when defining a generic type alias.
        unbound_tvar = (isinstance(sym.node, TypeVarExpr) and
                        self.tvar_scope.get_binding(sym) is None)
        if self.allow_unbound_tvars and unbound_tvar:
            return t

        # Option 3:
        # Enum value. Note: we only want to return a LiteralType when
        # we're using this enum value specifically within context of
        # a "Literal[...]" type. So, if `defining_literal` is not set,
        # we bail out early with an error.
        #

def resolve_combinable_type(combinable_type: Instance, django_context: DjangoContext) -> MypyType:
    if combinable_type.type.fullname != fullnames.F_EXPRESSION_FULLNAME:
        # Combinables aside from F expressions are unsupported
        return AnyType(TypeOfAny.explicit)

    return django_context.resolve_f_expression_type(combinable_type)

def visit_cast_expr(self, expr: CastExpr) -> Type:
        """Type check a cast expression."""
        source_type = self.accept(expr.expr, type_context=AnyType(), allow_none_return=True,
                                  always_allow_any=True)
        target_type = expr.type
        options = self.chk.options
        if options.warn_redundant_casts and is_same_type(source_type, target_type):
            self.msg.redundant_cast(target_type, expr)
        if 'unimported' in options.disallow_any and has_any_from_unimported_type(target_type):
            self.msg.unimported_type_becomes_any("Target type of cast", target_type, expr)
        return target_type

'def (int) -> int'.

    Note that each type can be None; in this case, it will not be applied.
    """
    tvars = callable.variables
    if len(tvars) != len(types):
        msg.incompatible_type_application(len(tvars), len(types), context)
        return AnyType()

    # Check that inferred type variable values are compatible with allowed
    # values and bounds.  Also, promote subtype values to allowed values.
    types = types[:]
    for i, type in enumerate(types):
        values = callable.variables[i].values
        if values and type:
            if isinstance(type, AnyType):
                continue
            if isinstance(type, TypeVarType) and type.values:
                # Allow substituting T1 for T if every allowed value of T1
                # is also a legal value of T.
                if all(any(is_same_type(v, v1) for v in values)
                       for v1 in type.values):
                    continue
            for value in values:
                if mypy.subtypes.is_subtype(type, value):
                    types[i] = value
                    break
            else:
                msg.incompatible_typevar_value(callable, i + 1, type, context)

        upper_bound = callable.variables[i].upper_bound
        if type and not mypy.subtypes.satisfies_upper_bound(type, upper_bound):