code: def test_label_set_confidence():
      label = Label(data_point=None, value="class_1", score=3.2)
  
      assert label.score == 3.2
      assert label.value == "class_1"
  
      label._score = 0.2
  
      assert label.score == 0.2
  
imports: import os
  import pytest
  import flair
  from flair.data import Corpus, Dictionary, Label, Sentence
  from flair.datasets import ColumnCorpus, FlairDatapointDataset, SentenceDataset
label_desc: Use image node_id 9 for calling a global function with example usage: test_label_set_confidence() without return types