class_docstr: Temporarily replace a module in sys.modules with an empty namespace
code: def __init__(self, mod_name):
      self.mod_name = mod_name
      self.module = ModuleType(mod_name)
      self._saved_module = []
  
imports: import sys
  import importlib.machinery
  import importlib.util
  import io
  import os
label_desc: Use image node_id 1 to create a new _TempModule object from inherited base classes: object with example: obj = _TempModule(mod_name)