Calling class method by name passed in variable

[Bruno Desthuilliers]

Nick Craig-Wood a écrit :
> Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid> wrote:
>>> Can someone suggest an efficient way of calling method whose name is
>>> passed in a variable?
>>>
>>  method = getattr(obj, 'method_name', None)
>>  if callable(method):
>>       method(args)
> 
> I think that that is needless LBYL...

 From experience, it isn't.


>    getattr(obj, 'method_name')(args)
> 
> Will produce some perfectly good exceptions

The problem is that you can't tell (without reading the exception's 
message and traceback etc) if the exception happened in you code or 
within the called method.