SYNTAX TREE DISPLAY SAMPLE.

INFINITE PRIME SIEVE IN PYTHON.  https://pastebin.com/5Ek9MiFj .

 ROOT: Module
  BODY[ 0 ]: Expr
   VALUE: Str
    S: '\nAN INFINITE PRIME SIEVE IS DEMONSTRAT
  BODY[ 1 ]: Import
   NAMES[ 0 ]: alias
    NAME: 'ctypes'
    ASNAME: 'CTYPES'
   NAMES[ 1 ]: alias
    NAME: 'random'
    ASNAME: 'RANDOM'
   NAMES[ 2 ]: alias
    NAME: 'string'
    ASNAME: 'STRING'
  BODY[ 2 ]: Expr
   VALUE: Call
    FUNC: Attribute
     ATTR: 'SetConsoleTitleW'
     VALUE: Attribute
      ATTR: 'Kernel32'
      VALUE: Attribute
       ATTR: 'windll'
       VALUE: Name
        ID: 'CTYPES'
    ARGS[ 0 ]: BinOp
     LEFT: Str
      S: '__PRIME_SIEVE.PY__.__'
     OP: Add
     RIGHT: Call
      FUNC: Attribute
       ATTR: 'join'
       VALUE: Str
        S: ''
      ARGS[ 0 ]: GeneratorExp
       ELT: Call
        FUNC: Attribute
         ATTR: 'choice'
         VALUE: Name
          ID: 'RANDOM'
        ARGS[ 0 ]: Attribute
         ATTR: 'digits'
         VALUE: Name
          ID: 'STRING'
       GENERATORS[ 0 ]: comprehension
        IS_ASYNC: 0
        TARGET: Name
         ID: '_'
        ITER: Call
         FUNC: Name
          ID: 'range'
         ARGS[ 0 ]: Call
          FUNC: Attribute
           ATTR: 'randint'
           VALUE: Name
            ID: 'RANDOM'
          ARGS[ 0 ]: Num
           N: 9999
          ARGS[ 1 ]: Num
           N: 59999
  BODY[ 3 ]: ClassDef
   NAME: 'NAMESPACE'
   BODY[ 0 ]: FunctionDef
    NAME: '__init__'
    RETURNS: None
    ARGS: arguments
     VARARG: None
     ARGS[ 0 ]: arg
      ARG: 'SELF'
      ANNOTATION: None
     KWARG: arg
      ARG: 'KWARGS'
      ANNOTATION: None
    BODY[ 0 ]: Expr
     VALUE: Call
      FUNC: Attribute
       ATTR: 'update'
       VALUE: Attribute
        ATTR: '__dict__'
        VALUE: Name
         ID: 'SELF'
      ARGS[ 0 ]: Name
       ID: 'KWARGS'
   BODY[ 1 ]: FunctionDef
    NAME: '__lt__'
    RETURNS: None
    ARGS: arguments
     VARARG: None
     KWARG: None
     ARGS[ 0 ]: arg
      ARG: 'SELF'
      ANNOTATION: None
     ARGS[ 1 ]: arg
      ARG: 'OTHER'
      ANNOTATION: None
    BODY[ 0 ]: Return
     VALUE: Compare
      LEFT: Attribute
       ATTR: 'MULTIPLE'
       VALUE: Name
        ID: 'SELF'
      OPS[ 0 ]: Lt
      COMPARATORS[ 0 ]: Attribute
       ATTR: 'MULTIPLE'
       VALUE: Name
        ID: 'OTHER'
  BODY[ 4 ]: Assign
   TARGETS[ 0 ]: Name
    ID: 'CONTAINER'
   VALUE: List
    ELTS[ 0 ]: Call
     FUNC: Name
      ID: 'NAMESPACE'
     KEYWORDS[ 0 ]: keyword
      ARG: 'PRIME'
      VALUE: Num
       N: 2
     KEYWORDS[ 1 ]: keyword
      ARG: 'MULTIPLE'
      VALUE: Num
       N: 4
    ELTS[ 1 ]: Call
     FUNC: Name
      ID: 'NAMESPACE'
     KEYWORDS[ 0 ]: keyword
      ARG: 'PRIME'
      VALUE: Num
       N: 3
     KEYWORDS[ 1 ]: keyword
      ARG: 'MULTIPLE'
      VALUE: Num
       N: 6
  BODY[ 5 ]: Assign
   TARGETS[ 0 ]: Name
    ID: '_PREVIOUS'
   VALUE: NameConstant
    VALUE: None
  BODY[ 6 ]: While
   TEST: NameConstant
    VALUE: True
   BODY[ 0 ]: Assign
    TARGETS[ 0 ]: Name
     ID: 'MULTIPLE'
    VALUE: Attribute
     ATTR: 'MULTIPLE'
     VALUE: Subscript
      VALUE: Name
       ID: 'CONTAINER'
      SLICE: Index
       VALUE: Num
        N: 0
   BODY[ 1 ]: Assert
    TEST: BoolOp
     OP: Or
     VALUES[ 0 ]: Compare
      LEFT: Name
       ID: '_PREVIOUS'
      OPS[ 0 ]: Is
      COMPARATORS[ 0 ]: NameConstant
       VALUE: None
     VALUES[ 1 ]: Compare
      LEFT: Name
       ID: '_PREVIOUS'
      OPS[ 0 ]: LtE
      OPS[ 1 ]: LtE
      COMPARATORS[ 0 ]: Name
       ID: 'MULTIPLE'
      COMPARATORS[ 1 ]: BinOp
       LEFT: Name
        ID: '_PREVIOUS'
       OP: Add
       RIGHT: Num
        N: 2
    MSG: Call
     FUNC: Name
      ID: 'str'
     ARGS[ 0 ]: List
      ELTS[ 0 ]: Name
       ID: '_PREVIOUS'
      ELTS[ 1 ]: Name
       ID: 'MULTIPLE'
   BODY[ 2 ]: AugAssign
    TARGET: Attribute
     ATTR: 'MULTIPLE'
     VALUE: Subscript
      VALUE: Name
       ID: 'CONTAINER'
      SLICE: Index
       VALUE: Num
        N: 0
    OP: Add
    VALUE: Attribute
     ATTR: 'PRIME'
     VALUE: Subscript
      VALUE: Name
       ID: 'CONTAINER'
      SLICE: Index
       VALUE: Num
        N: 0
   BODY[ 3 ]: Import
    NAMES[ 0 ]: alias
     NAME: 'heapq'
     ASNAME: 'HEAPQ'
   BODY[ 4 ]: Expr
    VALUE: Call
     FUNC: Attribute
      ATTR: '_siftup'
      VALUE: Name
       ID: 'HEAPQ'
     ARGS[ 0 ]: Name
      ID: 'CONTAINER'
     ARGS[ 1 ]: Num
      N: 0
   BODY[ 5 ]: If
    TEST: Compare
     LEFT: Attribute
      ATTR: 'MULTIPLE'
      VALUE: Subscript
       VALUE: Name
        ID: 'CONTAINER'
       SLICE: Index
        VALUE: Num
         N: 0
     OPS[ 0 ]: Eq
     COMPARATORS[ 0 ]: BinOp
      LEFT: Name
       ID: 'MULTIPLE'
      OP: Add
      RIGHT: Num
       N: 2
    BODY[ 0 ]: Assign
     TARGETS[ 0 ]: Name
      ID: 'PRIME'
     VALUE: BinOp
      LEFT: Name
       ID: 'MULTIPLE'
      OP: Add
      RIGHT: Num
       N: 1
    BODY[ 1 ]: Assert
     MSG: None
     TEST: Call
      FUNC: Name
       ID: 'all'
      ARGS[ 0 ]: GeneratorExp
       ELT: Compare
        LEFT: BinOp
         LEFT: Name
          ID: 'PRIME'
         OP: Mod
         RIGHT: Name
          ID: 'Z'
        OPS[ 0 ]: NotEq
        COMPARATORS[ 0 ]: Num
         N: 0
       GENERATORS[ 0 ]: comprehension
        IS_ASYNC: 0
        TARGET: Name
         ID: 'Z'
        ITER: Call
         FUNC: Name
          ID: 'range'
         ARGS[ 0 ]: Num
          N: 2
         ARGS[ 1 ]: Name
          ID: 'PRIME'
    BODY[ 2 ]: Expr
     VALUE: Call
      FUNC: Name
       ID: 'print'
      ARGS[ 0 ]: Name
       ID: 'PRIME'
      KEYWORDS[ 0 ]: keyword
       ARG: 'end'
       VALUE: Str
        S: ' '
      KEYWORDS[ 1 ]: keyword
       ARG: 'flush'
       VALUE: NameConstant
        VALUE: True
    BODY[ 3 ]: Assert
     MSG: None
     TEST: Call
      FUNC: Name
       ID: 'all'
      ARGS[ 0 ]: GeneratorExp
       ELT: Compare
        LEFT: BinOp
         LEFT: Num
          N: 2
         OP: Mult
         RIGHT: Name
          ID: 'PRIME'
        OPS[ 0 ]: Gt
        COMPARATORS[ 0 ]: Attribute
         ATTR: 'MULTIPLE'
         VALUE: Name
          ID: 'Z'
       GENERATORS[ 0 ]: comprehension
        IS_ASYNC: 0
        TARGET: Name
         ID: 'Z'
        ITER: Name
         ID: 'CONTAINER'
    BODY[ 4 ]: Expr
     VALUE: Call
      FUNC: Attribute
       ATTR: 'append'
       VALUE: Name
        ID: 'CONTAINER'
      ARGS[ 0 ]: Call
       FUNC: Name
        ID: 'NAMESPACE'
       KEYWORDS[ 0 ]: keyword
        ARG: 'PRIME'
        VALUE: Name
         ID: 'PRIME'
       KEYWORDS[ 1 ]: keyword
        ARG: 'MULTIPLE'
        VALUE: BinOp
         LEFT: Num
          N: 2
         OP: Mult
         RIGHT: Name
          ID: 'PRIME'
    BODY[ 5 ]: Assign
     TARGETS[ 0 ]: Name
      ID: '_PREVIOUS'
     VALUE: Name
      ID: 'PRIME'
    ORELSE[ 0 ]: Assert
     MSG: None
     TEST: Call
      FUNC: Name
       ID: 'any'
      ARGS[ 0 ]: GeneratorExp
       ELT: Compare
        LEFT: BinOp
         LEFT: Name
          ID: 'PRIME'
         OP: Mod
         RIGHT: Name
          ID: 'Z'
        OPS[ 0 ]: Eq
        COMPARATORS[ 0 ]: Num
         N: 0
       GENERATORS[ 0 ]: comprehension
        IS_ASYNC: 0
        TARGET: Name
         ID: 'Z'
        ITER: Call
         FUNC: Name
          ID: 'range'
         ARGS[ 0 ]: Num
          N: 2
         ARGS[ 1 ]: Name
          ID: 'MULTIPLE'
    ORELSE[ 1 ]: Assign
     TARGETS[ 0 ]: Name
      ID: '_PREVIOUS'
     VALUE: Name
      ID: 'MULTIPLE'
   BODY[ 6 ]: Import
    NAMES[ 0 ]: alias
     NAME: 'msvcrt'
     ASNAME: 'MSVCRT'
   BODY[ 7 ]: If
    TEST: Call
     FUNC: Attribute
      ATTR: 'kbhit'
      VALUE: Name
       ID: 'MSVCRT'
    BODY[ 0 ]: Expr
     VALUE: Call
      FUNC: Attribute
       ATTR: 'getche'
       VALUE: Name
        ID: 'MSVCRT'
    BODY[ 1 ]: Break