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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 cbk_qptdm_workflow(self, cbk):
 """ This callback is executed by the flow when bands_work.nscf_task reaches S_OK. It computes the list of q-points for the W(q,G,G'), creates nqpt tasks in the second work (QptdmWork), and connect the signals. """

        scr_input = cbk.data["input"]
        # Use the WFK file produced by the second
        # Task in the first Work (NSCF step).
        nscf_task = self[0][1]
        wfk_file = nscf_task.outdir.has_abiext("WFK")

        work = self[1]
        work.set_manager(self.manager)
        work.create_tasks(wfk_file, scr_input)
        work.add_deps(cbk.deps)

        work.set_flow(self)
        # Each task has a reference to its work.
        for task in work:
            task.set_work(work)
            # Add the garbage collector.
            if self.gc is not None: task.set_gc(self.gc)

        work.connect_signals()
        work.build()

        return work