old_contents: import importlib
  import importlib.machinery
  
  import sys
  
  from module import Module
  import json
  
  
  def message_to_function(raw_message):
      """
      converting json formatted string to a executable module.
  
      Args:
          raw_message (str): json formatted.
  
      Returns:
          None if raw_message is in wrong format, else
          return the executable module.
  
      """
  
      if raw_message is None:
          return None
  
      try:
          wisp = json.loads(raw_message)
      except json.JSONDecodeError:
          return None
  
      function_object = wisp["function_object"]
      path = function_object["function_path"]
      force_update = function_object["validate"]
      params = wisp["params"]
  
      name = wisp["uFid"]
  
      loader = importlib.machinery.SourceFileLoader(name, path)
  
      # if force update is enabled, and module exists.
      if force_update and sys.modules[name]:
          del sys.modules[name]
      # if force update is not enabled and module exists.
      elif sys.modules[name]:
          return sys.modules[name]
      # Whether force update or module does not exists.
  
      mod = None
      try:
          mod = loader.load_module()
      except FileNotFoundError:
          print("Module not found")
      finally:
          if mod is not None:
              wisp_module = Module(mod, params)
              return wisp_module
          return mod
  
new_contents: import importlib
  import importlib.machinery
  
  import sys
  
  from module import Module
  import json
  
  
  def message_to_function(raw_message):
      """
      converting json formatted string to a executable module.
  
      Args:
          raw_message (str): json formatted.
  
      Returns:
          None if raw_message is in wrong format, else
          return the executable module.
  
      """
  
      if raw_message is None:
          return None
  
      try:
          wisp = json.loads(raw_message)
      except json.JSONDecodeError:
          return None
  
      function_object = wisp["function_object"]
      path = function_object["function_path"]
      force_update = function_object["validate"]
      params = wisp["params"]
  
      name = str(wisp["uFid"])
  
      loader = importlib.machinery.SourceFileLoader(name, path)
  
      # if modules exists on the memory.
      if name in sys.modules.keys():
          if force_update:
              del sys.modules[name]
          else:
              return sys.modules[name]
  
      mod = None
      try:
          mod = loader.load_module()
      except FileNotFoundError:
          print("Module not found")
      finally:
          if mod is not None:
              wisp_module = Module(mod, params)
              return wisp_module
          return mod
subject: Fix errors cause by key error in sys.modules and wrong type error by uFid.