def codingthreads(self):
        """
        Find CDS features in .gff files to filter out non-coding sequences from the analysis
        """
        printtime('Extracting CDS features', self.start)
        # Create and start threads
        for i in range(self.cpus):
            # Send the threads to the appropriate destination function
            threads = Thread(target=self.codingsequences, args=())
            # Set the daemon to true - something to do with thread management
            threads.setDaemon(True)
            # Start the threading
            threads.start()
        for sample in self.runmetadata.samples:
            self.codingqueue.put(sample)
        self.codingqueue.join()
        # Create CDS files and determine gene presence/absence
        self.corethreads()