def __init__(self, name, callback, units=None, description=None):
"""
@param callback: an argumentless callable which returns a value
that constitutes this counter's value
@type callback: callable/0
"""
Counter.__init__(self, name, units=units, description=description)
self.callback = callback
def __init__(self, name, units=None, description=None, history=0):
"""
@param history: Maximum amount of history entries cached
"""
Counter.__init__(self, name, units=units, description=description)
self.current_value = None #: current value
self.history_len = history
self.history = [] #: list of tuple(time, value)
def __init__(self, name, resolution=1, units=None, description=None):
"""
Creates a new pulse-counting object
@param resolution: Resolution of the counter in seconds. It will aggregate
pulses in these periods
@type resolution: int or float
"""
Counter.__init__(self, name, units=units, description=description)
self.resolution = resolution
self.pulses = []
def __init__(self, name, units=None, description=None):
Counter.__init__(self, name, units=units, description=description)
self.current_value = 0 #: current value
