# RCSB_UTILS_TAXONOMY HISTORY
   9-Mar-2019  - V0.10 Created module supporting NCBI taxonomy name lookup
  23-Mar-2019  - V0.11 make cache file names python version specific
  25-Mar-2019  - V0.13 add test for merged taxons
  12-Apr-2019  - V0.14 add tree export method and update version/dependencies
  16-Apr-2019  - V0.15 cast types in tree node lists to string and remove lineage
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