Question about dnase_bias_estimator.py

[leinmeng]

Hello,
Recently I use pyDNase to deal with my ATAC-seq data. I encounter a question like below，and I used python 3.6 version. I don't know how to handle this. Could you give me a hint on that?
Thx!

Determining transposition sites (roughly 60s per 1E6 reads)...
Traceback (most recent call last):
File "/usr/local/bin/dnase_bias_estimator.py", line 85, in
bed_file_for_6mers = generate_6mer_bed(test_bam, genome_dic(genome))
File "/usr/local/bin/dnase_bias_estimator.py", line 51, in generate_6mer_bed
print("\t".join((str(i) for i in (chrom, startbp, endbp, 0, 0, strand))), file=outfile)
File "/usr/lib/python3.6/tempfile.py", line 624, in func_wrapper
return func(*args, **kwargs)
TypeError: a bytes-like object is required, not 'str'