code: def test_class_variables_for_namespace_warnings_work_correctly(
      self, caplog
  ):
      with caplog.at_level(
          logging.WARNING,
          logger="allennlp.data.fields.sequence_label_field",
      ):
          tags = ["B", "I", "O", "O", "O"]
          assert (
              "text"
              not in SequenceLabelField._already_warned_namespaces
          )
  
          _ = SequenceLabelField(
              tags, self.text, label_namespace="text"
          )
          assert caplog.records
  
          # We've warned once, so we should have set the class variable to False.
          assert "text" in SequenceLabelField._already_warned_namespaces
          caplog.clear()
          _ = SequenceLabelField(
              tags, self.text, label_namespace="text"
          )
          assert not caplog.records
  
          # ... but a new namespace should still log a warning.
          assert (
              "text2"
              not in SequenceLabelField._already_warned_namespaces
          )
          caplog.clear()
          _ = SequenceLabelField(
              tags, self.text, label_namespace="text2"
          )
          assert caplog.records
  
imports: from collections import defaultdict
  import logging
  import pytest
  import numpy
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Token, Vocabulary
  from allennlp.data.fields import TextField, SequenceLabelField
  from allennlp.data.token_indexers import SingleIdTokenIndexer
label_desc: Use image node_id 7 for calling the TestSequenceLabelField obj's underlying member method code with example usage: obj.test_class_variables_for_namespace_warnings_work_correctly(caplog) without return types