0(1) element: null
1(2) element: PyAssignmentStatement
2(3) WRITE ACCESS: x
3(4) element: PyAssignmentStatement
4(5) WRITE ACCESS: y
5(6) element: PyAssignmentStatement
6(7) READ ACCESS: True
7(8) WRITE ACCESS: c
8(9) element: PyAssignmentStatement
9(10) element: PyConditionalExpression
10(11,13) READ ACCESS: c
11(12) ASSERTTYPE ACCESS: c
12(14) READ ACCESS: x
13(14) READ ACCESS: y
14(15) WRITE ACCESS: z
15() element: null