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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 _initialize(self, funs_to_tally, length=None):
 """Initialize the tallyable objects. Makes sure a Trace object exists for each variable and then initialize the Traces. :Parameters: funs_to_tally : dict Name- function pairs. length : int The expected length of the chain. Some database may need the argument to preallocate memory. """


        for name, fun in six.iteritems(funs_to_tally):
            if name not in self._traces:
                self._traces[
                    name] = self.__Trace__(
                        name=name,
                        getfunc=fun,
                        db=self)

            self._traces[name]._initialize(self.chains, length)

        self.trace_names.append(list(funs_to_tally.keys()))

        self.chains += 1