code: def get_assembly(name):
      
  
      fn = pkg_resources.resource_filename(
          __name__, _assy_path_fmt.format(name=name))
      return json.load(gzip.open(fn, mode="rt", encoding="utf-8"))
docs: read a single assembly by name, returning a dictionary of assembly data
  
      >>> assy = get_assembly('GRCh37.p13')
  
      >>> assy['name']
      'GRCh37.p13'
  
      >>> assy['description']
      'Genome Reference Consortium Human Build 37 patch release 13 (GRCh37.p13)'
  
      >>> assy['refseq_ac']
      'GCF_000001405.25'
  
      >>> assy['genbank_ac']
      'GCA_000001405.14'
  
      >>> len(assy['sequences'])
      297
  
      >>> import pprint
      >>> pprint.pprint(assy['sequences'][0])
      {'aliases': ['chr1'],
       'assembly_unit': 'Primary Assembly',
       'genbank_ac': 'CM000663.1',
       'length': 249250621,
       'name': '1',
       'refseq_ac': 'NC_000001.10',
       'relationship': '=',
       'sequence_role': 'assembled-molecule'}