AttributeError: 'TaxonomyDb' object has not attribute 'parent_path'

[Shahab-Sa]

Hi Simon,
I installed metax and metax_py2 Conda environments. Activated metax Conda environment and run pip install .
Running the jupyter notebook Metagenomics Bench.ipynb to generate all plots on Ubuntu 18.04 LTS, I got some problems which I mention step-by-step. I stuck at the last one!

• FileNotFoundError: [Errno 2] File b'compiled_reports.tsv' does not exist: b'compiled_reports.tsv'

• I decompressed compiled_reports.tsv.gz

• NameError: name 'vr_numreads' is not defined

• I removed this line!

• FileNotFoundError: [Errno 2] No such file or directory: 'pdf/all_truth.pr_curve.pdf'

• I created empty folder pdf in the plotting folder.

• FileNotFoundError: /home/mx/metax/taxonomy/20180425/nodes.dmp

• I downloaded NCBI taxonomy, created this folder and extracted it in this path.

• AttributeError: 'TaxonomyDb' object has not attribute 'parent_path'
  It relates to this line of code: path = tax_db.parent_path(taxid, warn_missing=False)

Do you know where is the problem?
Thanks in advance.