old_contents: import sys # Used to get rid of py2/3 differences
  
  # Blatantly stolen from the excellent `six` library
  # Allows the same calls between python2 and python3
  if sys.version_info[0] == 3:
      exec_ = getattr(__builtins__, "exec")
      raw_input = input
  else:
      def exec_(_code_, _globs_=None, _locs_=None):
          """Execute code in a namespace."""
          if _globs_ is None:
              frame = sys._getframe(1)
              _globs_ = frame.f_globals
              if _locs_ is None:
                  _locs_ = frame.f_locals
              del frame
          elif _locs_ is None:
              _locs_ = _globs_
          exec("""exec _code_ in _globs_, _locs_""")
  
new_contents: import sys # Used to get rid of py2/3 differences
  
  # Blatantly stolen from the excellent `six` library
  # Allows the same calls between python2 and python3
  if sys.version_info[0] == 3:
      exec_ = __builtins__["exec"]
      raw_input = input
  else:
      def exec_(_code_, _globs_=None, _locs_=None):
          """Execute code in a namespace."""
          if _globs_ is None:
              frame = sys._getframe(1)
              _globs_ = frame.f_globals
              if _locs_ is None:
                  _locs_ = frame.f_locals
              del frame
          elif _locs_ is None:
              _locs_ = _globs_
          exec("""exec _code_ in _globs_, _locs_""")
  
subject: Fix python 3 support for exec