mypy.types.PlaceholderType

class documentation

class PlaceholderType(ProperType): (source)

Temporary, yet-unknown type during semantic analysis.

This is needed when there's a reference to a type before the real symbol table entry of the target type is available (specifically, we use a temporary PlaceholderNode symbol node). Consider this example:

class str(Sequence[str]): ...

We use a PlaceholderType for the 'str' in 'Sequence[str]' since we can't create a TypeInfo for 'str' until all base classes have been resolved. We'll soon perform another analysis iteration which replaces the base class with a complete type without any placeholders. After semantic analysis, no placeholder types must exist.

Method	`__init__`	Undocumented
Method	`accept`	Undocumented
Method	`serialize`	Undocumented
Class Variable	`__slots__`	Undocumented
Instance Variable	`args`	Undocumented
Instance Variable	`fullname`	Undocumented

Inherited from Type (via ProperType):

Class Method	`deserialize`	Undocumented
Method	`__repr__`	Undocumented
Method	`can_be_false_default`	Undocumented
Method	`can_be_true_default`	Undocumented
Instance Variable	`can_be_false`	Undocumented
Instance Variable	`can_be_true`	Undocumented

Inherited from Context (via ProperType, Type):

Method	`get_column`	Don't use. Use x.column.
Method	`get_line`	Don't use. Use x.line.
Method	`set_line`	If target is a node, pull line (and column) information into this node. If column is specified, this will override any column information coming from a node.
Instance Variable	`column`	Undocumented
Instance Variable	`end_line`	Undocumented
Instance Variable	`line`	Undocumented

def __init__(self, fullname, args, line): (source)

overrides mypy.types.Type.__init__

Undocumented

Parameters
fullname:`Optional[str]`	Undocumented
args:`List[Type]`	Undocumented
line:`int`	Undocumented

def accept(self, visitor): (source)

overrides mypy.types.Type.accept

Undocumented

Parameters
visitor:`TypeVisitor[T]`	Undocumented
Returns
`T`	Undocumented

def serialize(self): (source)

overrides mypy.types.Type.serialize

Undocumented

Returns
`str`	Undocumented

__slots__: tuple[str, ...] = (source)

overrides mypy.types.ProperType.__slots__

Undocumented

args = (source)

Undocumented

fullname = (source)

Undocumented