# Instance subscript

## Getitem unbound

```py
class NotSubscriptable: ...

a = NotSubscriptable()[0]  # error: "Cannot subscript object of type `NotSubscriptable` with no `__getitem__` method"
```

## Getitem not callable

```py
class NotSubscriptable:
    __getitem__ = None

# error: "Method `__getitem__` of type `Unknown | None` is not callable on object of type `NotSubscriptable`"
a = NotSubscriptable()[0]
```

## Valid getitem

```py
class Identity:
    def __getitem__(self, index: int) -> int:
        return index

reveal_type(Identity()[0])  # revealed: int
```

## Getitem union

```py
def _(flag: bool):
    class Identity:
        if flag:
            def __getitem__(self, index: int) -> int:
                return index
        else:
            def __getitem__(self, index: int) -> str:
                return str(index)

    reveal_type(Identity()[0])  # revealed: int | str
```