| 0(1) element: null | |
| 1(2) element: PyAssignmentStatement | |
| 2(3) WRITE ACCESS: sibling | |
| 3(4) element: PyIfStatement | |
| 4(5,10) READ ACCESS: sibling | |
| 5(6) element: PyStatementList. Condition: sibling:true | |
| 6(7) ASSERTTYPE ACCESS: sibling | |
| 7(8) element: PyAssignmentStatement | |
| 8(9) element: PySubscriptionExpression | |
| 9(10) READ ACCESS: sibling | |
| 10() element: null |