code: def _get_fastq_files(ldetail, read, fastq_dir):
      
      return glob.glob(os.path.join(fastq_dir, "Project_%s" % ldetail["project_name"],
                                    "Sample_%s" % ldetail["name"],
                                    "%s_*_%s_*.fastq.gz" % (ldetail["name"], read)))
docs: Retrieve fastq files corresponding to the sample and read number.