class_docstr: Methods in this class recursively traverse an AST and
  output source code for the abstract syntax; original formatting
  is disregarged.
class_docstr_tok: ["Methods","in","this","class","recursively","traverse","an","AST","and","output","source","code","for","the","abstract","syntax",";","original","formatting","is","disregarged","."]
code: def _Slice(self, t):
      self._dispatch(t.expr)
      self._write("[")
      if t.lower:
          self._dispatch(t.lower)
      self._write(":")
      if t.upper:
          self._dispatch(t.upper)
      # if t.step:
      #    self._write(":")
      #    self._dispatch(t.step)
      self._write("]")
  
imports: from __future__ import division, absolute_import, print_function
  import sys
  from compiler.ast import Const, Name, Tuple, Div, Mul, Sub, Add
label_desc: Use image node_id 42 for calling the UnparseCompilerAst obj's underlying member method code with example usage: obj._Slice(t) without return types