Overriding Methods With Composition

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Adafruit CircuitPython ce2754d50 on 2020-06-21; Adafruit ItsyBitsy M4 Express with samd51g19
>>> import board
>>> from frequencyio import FrequencyIn
>>> class NewFreqIn:
...     def __init__(self, pin):
...         self._freqin = FrequencyIn(pin) # composed base class as an attribute of NewFreqIn
...
...     @property
...     def capture_period(self):
...         return "capture_period is: {}".format(self._freqin.capture_period)
...
...     @capture_period.setter
...     def capture_period(self, value):
...         print("setting capture_period to:", value)
...         self._freqin.capture_period = value
...
>>> foo = NewFreqIn(board.D2)

# Accessing FrequencyIn.capture_period via the overridden methods in NewFreqIn
>>> foo.capture_period
'capture_period is: 10'
>>> foo.capture_period = 50
setting capture_period to: 50
>>> foo.capture_period
'capture_period is: 50'

# Accessing FrequencyIn.capture_period directly via the NewFreqIn._freqin attribute
>>> foo._freqin.capture_period
10
>>> foo._freqin.capture_period = 50
>>> foo._freqin.capture_period
50