Generic

Abstract base class for generic types.

Syntax

PYTHON Copy

class typing.Generic

Examples

Example 1

PYTHON Copy

class Mapping(Generic[KT, VT]):
    def __getitem__(self, key: KT) -> VT:
        ...
         Etc.

Example 2

PYTHON Copy

X = TypeVar('X')
Y = TypeVar('Y')

def lookup_name(mapping: Mapping[X, Y], key: X, default: Y) -> Y:
    try:
        return mapping[key]
    except KeyError:
        return default