The contig ID must be twenty characters or fewer. The names of the headers created following SPAdes assembly
        are usually far too long. This renames them as the sample name

def headerthreads(self):
        """
        The contig ID must be twenty characters or fewer. The names of the headers created following SPAdes assembly
        are usually far too long. This renames them as the sample name
        """
        # Create and start threads
        for i in range(self.cpus):
            # Send the threads to the appropriate destination function
            threads = Thread(target=self.headers, 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:
            # Create an attribute to store the path/file name of the fasta file with fixed headers
            sample.general.fixedheaders = sample.general.bestassemblyfile.replace('.fasta', '.ffn')
            self.headerqueue.put(sample)
        self.headerqueue.join()