def simplified_union()

in chz/tiepin.py [0:0]

• 21 lines of code
• 11 McCabe index (conditional complexity)

def simplified_union(types):
    if len(types) == 0:
        return typing.Never
    if len(types) == 1:
        return types[0]

    union_types = []
    for typ in types:
        if getattr(typ, "__args__", None) is None and any(
            issubclass(typ, member) for member in union_types
        ):
            continue
        union_types.append(typ)

    types = union_types
    union_types = []
    for typ in reversed(types):
        if getattr(typ, "__args__", None) is None and any(
            issubclass(typ, member) for member in union_types
        ):
            continue
        union_types.append(typ)

    return functools.reduce(operator.or_, union_types)