code: def interpret(source, frame, should_fail=False):
      mod = ast.parse(source)
      visitor = DebugInterpreter(frame)
      try:
          visitor.visit(mod)
      except Failure:
          failure = sys.exc_info()[1]
          return getfailure(failure)
      if should_fail:
          return (
              "(assertion failed, but when it was re-run for "
              "printing intermediate values, it did not fail.  Suggestions: "
              "compute assert expression before the assert or use --no-assert)"
          )
  
imports: import sys
  import ast
  import py
  from py._code.assertion import _format_explanation, BuiltinAssertionError
label_desc: Use image node_id 3 for calling a global function with example usage: interpret(source, frame, should_fail) and returns: str, getfailure