def test_ast_valid_let():
 can_compile(u'(let [a b])')
 can_compile(u'(let [a 1])')
 can_compile(u'(let [a 1 b None])')

def test_ast_valid_let ( ) : can_compile ( u'(let [a b])' ) can_compile ( u'(let [a 1])' ) can_compile ( u'(let [a 1 b None])' )
make sure ast can compile valid let .