Python 动态载入包

def  get_plugin_by_name( self , package, clazz_name):
    """
    package 类所在路径
    clazz_name 类名
    http://stackoverflow.com/questions/547829/how-to-dynamically-load-a-python-class
    https://docs.python.org/2/library/functions.html?highlight=__import__#__import__
    :param package:
    :param clazz_name:
    :return:
    """
    try :
        plugin_name  =  clazz_name.capitalize()  +  'Plugin'
        module  =  __import__ (package  +  '.'  +  clazz_name, fromlist = [plugin_name])
        claz  =  getattr (module, plugin_name)
        return  claz(region_id = self .get_current_region_id(),
                    access_key = self .aliyun_access_key)
    except  Exception as exp:
        LOG.error( "Get plugin: %s by package: %s error for %s"  %  (clazz_name, package, exp,))

via  http://wangyuelucky.blog.51cto.com/1011508/1751969

#getMod("xx.xx.cc","class_in_cc")

def getMod(self, name, classname):
    m = __import__(name, globals(), locals(), [classname])
    c = getattr(m, classname)
    return c