def __init__(self, *args, **kwargs):
self._order = kwargs.pop('order', 4)
flow = kwargs.pop('lowpass', None)
fhigh = kwargs.pop('highpass', None)
if None not in [flow, fhigh]:
self._btype = 'band'
self._fcrit = numpy.array([flow, fhigh])
elif flow is not None:
self._btype = 'low'
self._fcrit = numpy.array([flow])
elif fhigh is not None:
self._btype = 'high'
self._fcrit = numpy.array([fhigh])
else:
raise NotImplementedError
FilterFile.__init__(self, *args, **kwargs)