def attrnum(self, attr):
        "Returns the number used for attr, which can be a name, or -n .. n-1."
        if attr < 0:
            return len(self.attrs) + attr
        elif isinstance(attr, str):
            return self.attrnames.index(attr)
        else:
            return attr
def attrnum(self, attr):
        "Returns the number used for attr, which can be a name, or -n .. n-1."
        if attr < 0:
            return len(self.attrs) + attr
        elif isinstance(attr, str):
            return self.attrnames.index(attr)
        else:
            return attr
def attrnum ( self , attr ) : if attr < 0 : return len ( self . attrs ) + attr elif isinstance ( attr , str ) : return self . attrnames . index ( attr ) else : return attr
Returns the number used for attr, which can be a name, or -n .. n-1.
Returns the number used for attr which can be a name or - n .. n - 1 .