Getting attributes from a list containing classes

[midarq]

Hi!

I have a small problem:

I defined a class Tone which inherits from the class Recorder. (i.e. a recorder is an instrument which has many notes). Each Tone has certain attributes like frequency, fingering, etc. Currently, I am doing the following:

class Recorder(object):
    def __init__(self):
        self.alltones=[Tone(ii) for ii in range(10)]
class Tone(Recorder):
    def __init__(self,ii):
        self.frequency=2**(ii/12)

This however doesn't satisfy me as I would like to be able to easily create a list of all frequencies from an instance of Recorder. Something along these lines

a=Recorder()
a.alltones.frequency

In particular, I am looking for a clean way of creating lists of the following type

[Tone(ii).attribute for ii in range(10)]

Thank you in advance for your help :)