I have this error in the submission, not sure how to solve it. This is part of the code: ``` def fill_feature_mat(rows): snps_featurs=pd.DataFrame(np.zeros([len(rows),len(my_snp_list)]),index=rows,columns=my_snp_list) for index in rows: vcf_file=validation_data.loc[index,'WES_mutationFileMutect'] if pd.isnull(vcf_file): continue vcf_file = vcf_dir + vcf_file f=pysam.VariantFile(vcf_file) for rec in f.fetch(): if (rec.id != None): if (rec.id in my_snp_list): snps_featurs.set_value(index,rec.id,1) return snps_featurs pool = Pool(ncpus) snps_featurs = pd.concat(pool.map(fill_feature_mat,sub_tasks)) pool.close() pool.join() ``` The error is: ``` Traceback (most recent call last): File "./prepare_data_matrix.py", line 160, in indel_variant_stat = pd.concat(pool.map(fill_caleb_features,sub_tasks)) File "/usr/lib/python2.7/multiprocessing/pool.py", line 251, in map return self.map_async(func, iterable, chunksize).get() File "/usr/lib/python2.7/multiprocessing/pool.py", line 567, in get raise self._value NotImplementedError: seek not implemented in files compressed by method 1 ``` I don't have any error when I run it in my machine. Not sure why it can be run in docker. Really need some helps here. Thank you! Yichao