(lines)
return (PlyElement(name, properties, count, comments), lines[a:])
Consume one element definition.  The unconsumed input is
        returned along with a PlyElement instance.
Consume one element definition.  The unconsumed input is
        returned along with a PlyElement instance.
Consume one element definition . The unconsumed input is returned along with a PlyElement instance .
def _parse_one(lines):
        """
        Consume one element definition.  The unconsumed input is
        returned along with a PlyElement instance.

        """
        a = 0
        line = lines[a]

        if line[0] != "element":
            raise PlyParseError("expected 'element'")
        if len(line) > 3:
            raise PlyParseError("too many fields after 'element'")
        if len(line) < 3:
            raise PlyParseError("too few fields after 'element'")

        (name, count) = (line[1], int(line[2]))

        comments = []
        properties = []
        while True:
            a += 1
            if a >= len(lines):
                break

            if lines[a][0] == "comment":
                comments.append(lines[a][1])
            elif lines[a][0] == "property":
                properties.append(PlyProperty._parse_one(lines[a]))
            else:
                break

        return (PlyElement(name, properties, count, comments), lines[a:])
def _parse_one ( lines ) : a = 0 line = lines [ a ] if line [ 0 ] != "element" : raise PlyParseError ( "expected 'element'" ) if len ( line ) > 3 : raise PlyParseError ( "too many fields after 'element'" ) if len ( line ) < 3 : raise PlyParseError ( "too few fields after 'element'" ) ( name , count ) = ( line [ 1 ] , int ( line [ 2 ] ) ) comments = [ ] properties = [ ] while True : a += 1 if a >= len ( lines ) : break if lines [ a ] [ 0 ] == "comment" : comments . append ( lines [ a ] [ 1 ] ) elif lines [ a ] [ 0 ] == "property" : properties . append ( PlyProperty . _parse_one ( lines [ a ] ) ) else : break return ( PlyElement ( name , properties , count , comments ) , lines [ a : ] )