docstr: Load from the DB file at db_path and feed dataset field blobs
docstr_tok: ["Load","from","the","DB","file","at","db_path","and","feed","dataset","field","blobs"]
code: def _feed_field_blobs_from_db_file(self, net):
      """Load from the DB file at db_path and feed dataset field blobs"""
      if self.db_type == "log_file_db":
          assert os.path.exists(
              self.db_path
          ), "db_path [{db_path}] does not exist".format(
              db_path=self.db_path
          )
      net.Load(
          [],
          self.ds.get_blobs(),
          db=self.db_path,
          db_type=self.db_type,
          absolute_path=True,
          source_blob_names=self.ds.field_names(),
      )
  
file_path: pytorch/caffe2/python/db_file_reader.py
imports: from caffe2.python import core, scope, workspace, _import_c_extension
  from caffe2.python.dataio import Reader
  from caffe2.python.dataset import Dataset
  from caffe2.python.schema import from_column_list
  import os
label_desc: Use image node_id 7 for calling the DBFileReader obj's underlying member method code with example usage: obj._feed_field_blobs_from_db_file(net) without return types