python 动态调用函数实例解析

from collections import OrderedDict class ComponentCheck:  def __init__(self, data_dir):    self.data_dir = data_dir     self._extend_function_dic = OrderedDict({})   def add_extend_function(self, function_name, *parameters):    self._extend_function_dic[function_name] = parameters   def _check_extend_function(self):    for function_name, parameters in self._extend_function_dic.iteritems():      if not apply(function_name, parameters):        return False    return True class CheckFunctions:  def __init__(self):    pass   def tollcost_check(data_path):    toll_cost_path = os.path.join(data_path, Importer.DT_KOR_TOLL_COST)    tollcost_component = ComponentCheck(toll_cost_path)    tollcost_component.add_extend_function(tollcost_component.check_file_pattern_list_match, CheckFunctions.TOLL_COST_FILENAME_PATTERN)    return tollcost_component@staticmethod  def speed_camera_check(data_path):    speed_camera_path = os.path.join(data_path, Importer.DT_SAFETY_CAMERA)    speed_camera_component = ComponentCheck(speed_camera_path)    speed_camera_component.add_extend_function(speed_camera_component.check_not_exist_empty_directory)    return speed_camera_component