code: def _validate_information(self):
          
  
          needed_variables = ["ModuleName", "ModuleVersion", "APIVersion"]
  
          for var in needed_variables:
              if var not in self.variables:
                  raise DataError("Needed variable was not defined in mib file.", variable=var)
  
          # Make sure ModuleName is <= 6 characters
          if len(self.variables["ModuleName"]) > 6:
              raise DataError("ModuleName too long, must be 6 or fewer characters.",
                              module_name=self.variables["ModuleName"])
  
          if not isinstance(self.variables["ModuleVersion"], str):
              raise ValueError("ModuleVersion ('%s') must be a string of the form X.Y.Z" %
                               str(self.variables['ModuleVersion']))
  
          if not isinstance(self.variables["APIVersion"], str):
              raise ValueError("APIVersion ('%s') must be a string of the form X.Y" % str(self.variables['APIVersion']))
  
          self.variables['ModuleVersion'] = self._convert_module_version(self.variables["ModuleVersion"])
          self.variables['APIVersion'] = self._convert_api_version(self.variables["APIVersion"])
          self.variables["ModuleName"] = self.variables["ModuleName"].ljust(6)
  
          self.valid = True
docs: Validate that all information has been filled in