Class FormalMappingLike

tests/test_stl.py:664–665

    # Implements the Mapping protocol by reusing BareMappingLike's implementation.
    # Additionally, inherits from collections.abc.Mapping.
    class FormalMappingLike(BareMappingLike, Mapping):
        pass

    a1b2c3 = {"a": 1, "b": 2, "c": 3}
    # convert mode