0(1) element: null
1(2) element: PyAssignmentStatement
2(3) WRITE ACCESS: sibling
3(4) element: PyIfStatement
4(5,6) READ ACCESS: sibling
5(12) element: null. Condition: sibling:false
6(7) element: null. Condition: sibling:true
7(8) ASSERTTYPE ACCESS: sibling
8(9) element: PyStatementList
9(10) element: PyAssignmentStatement
10(11) element: PySubscriptionExpression
11(12) READ ACCESS: sibling
12() element: null