code: def _get_implementation():
      if sys.implementation.name == "pypy":
          return "pypy"
      return "python"
  
imports: from subprocess import check_call
  import os
  import re
  import shutil
  import sys
  import sysconfig
  import unittest
label_desc: Use image node_id 1 for calling a global function with example usage: _get_implementation() and returns: str, str