code: def test_experiment_log():
      tracker = SQLiteTracker(":memory:")
      experiment = tracker.new_experiment()
      experiment.log("accuracy", 0.8)
  
      retrieved = tracker.get(experiment.uuid)
  
      assert retrieved._data == {"accuracy": 0.8}
      assert len(tracker) == 1
  
imports: import json
  from uuid import uuid4
  import time
  import pytest
  from sklearn_evaluation.tracker import SQLiteTracker
  from sklearn_evaluation import tracker
  from sklearn_evaluation import plot
label_desc: Use image node_id 19 for calling a global function with example usage: test_experiment_log() without return types