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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 read(self):
 """ Validate pidfile and make it stale if needed"""

        if not self.fname:
            return
        try:
            with open(self.fname, "r") as f:
                wpid = int(f.read() or 0)
                if wpid <= 0:
                    return
                return wpid
        except IOError:
            return