Function is_tuple

src/black/nodes.py:632–640

Return True if `node` holds a tuple.

(node: LN)

def is_tuple(node: LN) -> bool:
    """Return True if `node` holds a tuple."""
    if node.type != syms.atom:
        return False
    gexp = unwrap_singleton_parenthesis(node)
    if gexp is None or gexp.type != syms.testlist_gexp:
        return False

    return True


def is_tuple_containing_walrus(node: LN) -> bool: