import os, sys;exec('from __future__ import print_function\nif "PYTHONHUNTER" in os.environ:\n try:\n  from hunter import *\n  eval("trace({[PYTHONHUNTER]})".format(os.environ))\n except Exception as exc:\n  sys.stderr.write("Failed to load hunter from PYTHONHUNTER environ variable {[PYTHONHUNTER]!r}: {!r}\\n".format(os.environ, exc))\n')