Function has

src/attr/_funcs.py:354–379

Check whether *cls* is a class with *attrs* attributes. Args: cls (type): Class to introspect. Raises: TypeError: If *cls* is not a class. Returns: bool:

(cls)

def has(cls):
    class="st">"""
    Check whether *cls* is a class with *attrs* attributes.

    Args:
        cls (type): Class to introspect.

    Raises:
        TypeError: If *cls* is not a class.

    Returns:
        bool:
    class="st">"""
    attrs = getattr(cls, class="st">"__attrs_attrs__", None)
    if attrs is not None:
        return True

    class="cm"># No attrs, maybe it's a specialized generic (A[str])?
    generic_base = get_generic_base(cls)
    if generic_base is not None:
        generic_attrs = getattr(generic_base, class="st">"__attrs_attrs__", None)
        if generic_attrs is not None:
            class="cm"># Stick it on here for speed next time.
            cls.__attrs_attrs__ = generic_attrs
        return generic_attrs is not None
    return False


def assoc(inst, **changes):