def _ns_var(
    py_ns_var: str = _NS_VAR, lisp_ns_var: str = LISP_NS_VAR, lisp_ns_ns: str = CORE_NS
) -> ast.Assign:
    """Assign a Python variable named `ns_var` to the value of the current
    namespace."""
    return ast.Assign(
        targets=[ast.Name(id=py_ns_var, ctx=ast.Store())],
        value=ast.Call(
            func=_FIND_VAR_FN_NAME,
            args=[
                ast.Call(
                    func=_NEW_SYM_FN_NAME,
                    args=[ast.Str(lisp_ns_var)],
                    keywords=[ast.keyword(arg="ns", value=ast.Str(lisp_ns_ns))],
                )
            ],
            keywords=[],
        ),
    )
Assign a Python variable named `ns_var` to the value of the current
    namespace.