code: def scrub_py2_sys_modules():
      
      if PY3:
          return {}
      scrubbed = {}
      for modulename in REPLACED_MODULES & set(RENAMES.keys()):
          if not modulename in sys.modules:
              continue
  
          module = sys.modules[modulename]
  
          if is_py2_stdlib_module(module):
              flog.debug('Deleting (Py2) {} from sys.modules'.format(modulename))
              scrubbed[modulename] = sys.modules[modulename]
              del sys.modules[modulename]
      return scrubbed
docs: Removes any Python 2 standard library modules from ``sys.modules`` that
      would interfere with Py3-style imports using import hooks. Examples are
      modules with the same names (like urllib or email).
  
      (Note that currently import hooks are disabled for modules like these
      with ambiguous names anyway ...)