birdnotes.py: Objects to represent bird note files

# - - -   P h o t o . r e a d N o d e

#   @staticmethod
    def readNode ( node ):
        """Convert from XML.
        """
        #-- 1 --
        # [ catNo  :=  node's rnc.CAT_NO_A attribute ]
        catNo  =  node.attrib [ rnc.CAT_NO_A ]

        #-- 2 --
        # [ if node has an rnc.URL_A attribute ->
        #     url  :=  that attribute's value
        #   else ->
        #     url  :=  None ]
        url  =  node.attrib.get ( rnc.URL_A, None )

Note that node.text will be None if there was no content in the photo element. See Section 16.1, “Photo.__init__()”.

        #-- 3 --
        return  Photo ( catNo, url, node.text )

    readNode  =  staticmethod ( readNode )