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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 to_timepoints(self, unit='hours', offset=None):
 """Return an |numpy.ndarray| representing the starting time points of the |Timegrid| object. The following examples identical with the ones of |Timegrid.from_timepoints| but reversed. By default, the time points are given in hours: array([ 0., 6., 12., 18.]) Other time units (`days` or `min`) can be defined (only the first character counts):
 array([ 0. , 0.25, 0.5 , 0.75]) Additionally, one can pass an `offset` that must be of type |int| or an valid |Period| initialization argument: array([ 24., 30., 36., 42.]) array([ 24., 30., 36., 42.]) array([ 1. , 1.25, 1.5 , 1.75]) """

        unit = Period.from_cfunits(unit)
        if offset is None:
            offset = 0.
        else:
            try:
                offset = Period(offset)/unit
            except TypeError:
                offset = offset
        step = self.stepsize/unit
        nmb = len(self)
        variable = numpy.linspace(offset, offset+step*(nmb-1), nmb)
        return variable