class_docstr: Class for reading from native BedGraph files.
  
  Most users will want to use BedGraphReader instead, because it dynamically
  dispatches between reading native BedGraph files and TFRecord files based on
  the filename's extension.
class_docstr_tok: ["Class","for","reading","from","native","BedGraph","files",".","Most","users","will","want","to","use","BedGraphReader","instead",",","because","it","dynamically","dispatches","between","reading","native","BedGraph","files","and","TFRecord","files","based","on","the","filename","'s","extension","."]
code: def __exit__(self, exit_type, exit_value, exit_traceback):
      self._reader.__exit__(exit_type, exit_value, exit_traceback)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from third_party.nucleus.io import genomics_reader
  from third_party.nucleus.io import genomics_writer
  from third_party.nucleus.io.python import bedgraph_reader
  from third_party.nucleus.io.python import bedgraph_writer
  from third_party.nucleus.protos import bedgraph_pb2
label_desc: Use image node_id 4 for calling the NativeBedGraphReader obj's underlying member method code with example usage: obj.__exit__(exit_type, exit_value, exit_traceback) without return types