With lambda, the ban on "return x" in generators can be evaded:

>>> x = lambda: ((yield 1), (yield 2))
>>> list(x())
[1, 2, (None, None)]
>>> dis.dis(x)
  1           0 LOAD_CONST               0 (1)
              3 YIELD_VALUE
              4 LOAD_CONST               1 (2)
              7 YIELD_VALUE
              8 BUILD_TUPLE              2
             11 RETURN_VALUE