code: def is_matplotlib_installed():
      try:
          import matplotlib  # noqa: F401 - Matplotlib is optional.
      except:  # noqa: E722. Any exception means we don't have a working matplotlib.
          return False
      return True
  
imports: import argparse
  import os
  import pytest
  from allennlp.common import Params
  from allennlp.data import Vocabulary
  from allennlp.models import Model
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.testing import AllenNlpTestCase, requires_multi_gpu
  from allennlp.commands.find_learning_rate import search_learning_rate, find_learning_rate_from_args, find_learning_rate_model, FindLearningRate
  from allennlp.training import Trainer
  from allennlp.training.util import data_loaders_from_params
label_desc: Use image node_id 1 for calling a global function with example usage: is_matplotlib_installed() and returns: True, False