0(1) element: null
1(2) element: PyWhileStatement
2(3,4) READ ACCESS: True
3() element: null. Condition: True:false
4(5) element: null. Condition: True:true
5(6) ASSERTTYPE ACCESS: True
6(7) element: PyStatementList
7(8) element: PyTryExceptStatement
8(9,13) element: PyTryPart
9(10,13) element: PyAssignmentStatement
10(11,13) READ ACCESS: could_raise
11(12,13) element: PyCallExpression: could_raise
12(13,16) WRITE ACCESS: foo
13(14) element: PyExceptPart
14(15) READ ACCESS: IndexError
15(18) element: PyBreakStatement
16(17) element: PyPrintStatement
17(1) READ ACCESS: foo
18() element: null