def parse_argument(self, arg):
        """Parse a single argument.
        
        Lookup arg in self.specials, or call .to_python() if absent. Raise 
        BadArgument on errors.
        """
        lookup = self.casesensitive and arg or arg.lower()
        if lookup in self.special:
            return self.special[lookup]
        try:
            return self.to_python(arg, *self.args, **self.kw)
        except Exception, e:
            raise BadArgument(arg, str(e))
def parse_argument(self, arg):
        """Parse a single argument.
        
        Lookup arg in self.specials, or call .to_python() if absent. Raise 
        BadArgument on errors.
        """
        lookup = self.casesensitive and arg or arg.lower()
        if lookup in self.special:
            return self.special[lookup]
        try:
            return self.to_python(arg, *self.args, **self.kw)
        except Exception, e:
            raise BadArgument(arg, str(e))
def parse_argument ( self , arg ) : lookup = self . casesensitive and arg or arg . lower ( ) if lookup in self . special : return self . special [ lookup ] try : return self . to_python ( arg , * self . args , * * self . kw ) except Exception , e : raise BadArgument ( arg , str ( e ) )
Parse a single argument.
        
        Lookup arg in self.specials, or call .to_python() if absent. Raise 
        BadArgument on errors.
Parse a single argument . Lookup arg in self . specials or call . to_python () if absent . Raise BadArgument on errors .