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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 update(self):
 """It updates process information of the cgroup."""

        pids = fileops.readlines(self.paths['cgroup.procs'])
        self.pids = [int(pid) for pid in pids if pid != '']
        self.n_procs = len(pids)