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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def preallocate_memory(self, capacity):
 """ Preallocate memory to store audio samples, to avoid repeated new allocations and copies while performing several consecutive append operations. If ``self.__samples`` is not initialized, it will become an array of ``capacity`` zeros. If ``capacity`` is larger than the current capacity, the current ``self.__samples`` will be extended with zeros. If ``capacity`` is smaller than the current capacity, the first ``capacity`` values of ``self.__samples`` will be retained. :param int capacity: the new capacity, in number of samples :raises: ValueError: if ``capacity`` is negative .. versionadded:: 1.5.0 """

        if capacity < 0:
            raise ValueError(u"The capacity value cannot be negative")
        if self.__samples is None:
            self.log(u"Not initialized")
            self.__samples = numpy.zeros(capacity)
            self.__samples_length = 0
        else:
            self.log([u"Previous sample length was   (samples): %d", self.__samples_length])
            self.log([u"Previous sample capacity was (samples): %d", self.__samples_capacity])
            self.__samples = numpy.resize(self.__samples, capacity)
            self.__samples_length = min(self.__samples_length, capacity)
        self.__samples_capacity = capacity
        self.log([u"Current sample capacity is   (samples): %d", self.__samples_capacity])