def test_freenames_detection_2():
result = detect_names('(lambda x: lambda p, y=p(x): x + y)(x)')
expected = {'p', 'x'}
assert result == expected
def test_freenames_detection_1():
result = detect_names('all(x for x in this for y in those if p(y)'
' for z in y)')
expected = {'this', 'those', 'p', 'all'}
assert result == expected
