Update crmask.py

__all__ = ['CRMask']

class CRMask:

    def __init__(self, obj, flag = None, mask = None, clean = None, sky = None, save_flag = True, update_flag = True, save_name = None, flag_suffix = 'flg', clean_suffix = 'crclean', append_flag = False, mask_suffix = 'crmask', model = 'deepCR', fill_flag = True, fill_method = 'inpainting', gpu_flag = False, config_path = 'MSC_crmask.ini', **kwargs):

    def __init__(self, obj, flag = None, mask = None, clean = None, sky = None, save_flag = True, update_flag = True, save_name = None, flag_suffix = 'flg', clean_suffix = 'crclean', append_flag = False, mask_suffix = 'crmask', model = 'deepCR', fill_flag = True, fill_method = 'inpainting', gpu_flag = False, config_path = 'crmask.ini', **kwargs):

        """

            Instantiation of CRMask with specified model configuration.

            Parameters

            gpu_flag : (optional) boolean

                whether use GPU, default is False

            config_path : (optional) string

                configuration file path, default is ``../conf/MSC_crmask.ini``

                configuration file path, default is ``./crmask.ini``

        """

        self.model = model

        if model == 'deepCR_train':