appstate.py
def has_catalog(self):
        """
        returns true if there is a catalog

        :return:
        """
        return self.__image_catalog is not None

        returns true if there is a catalog

        :return:
        
returns true if there is a catalog
returns true if there is a catalog
def has_catalog(self):
        return self.__image_catalog is not None
def has_catalog ( self ) : return self . __image_catalog is not None
returns true if there is a catalog
returns true if there is a catalog
"""
        returns true if there is a catalog

        :return:
        """
None
self