class_docstr: This class modifies the net passed in by adding ops to get a certain entry
  from certain blobs.
  
  Args:
      blobs: list of blobs to get entry from
      logging_frequency: frequency for printing entry values to logs
      i1, i2: the first, second dimension of the blob. (currently, we assume
      the blobs to be 2-dimensional blobs). When i2 = -1, print all entries
      in blob[i1]
code: def __init__(self, blobs, logging_frequency, i1=0, i2=0):
      self._blobs = blobs
      self._logging_frequency = logging_frequency
      self._i1 = i1
      self._i2 = i2
      self._field_name_suffix = (
          "_{0}_{1}".format(i1, i2)
          if i2 >= 0
          else "_{0}_all".format(i1)
      )
  
imports: from caffe2.python import core, schema
  from caffe2.python.modeling.net_modifier import NetModifier
  import numpy
label_desc: Use image node_id 1 to create a new GetEntryFromBlobs object from inherited base classes: NetModifier with example: obj = GetEntryFromBlobs(blobs, logging_frequency, i1, i2)