code: def test_update_model_cost_map_url():
      try:
          litellm.register_model(
              model_cost="https://raw.githubusercontent.com/BerriAI/litellm/main/model_prices_and_context_window.json"
          )
          assert (
              litellm.model_cost["gpt-4"]["input_cost_per_token"]
              == 0.00003
          )
      except Exception as e:
          pytest.fail(f"An error occurred: {e}")
  
imports: import sys, os
  import traceback
  import pytest
  import litellm
label_desc: Use image node_id 2 for calling a global function with example usage: test_update_model_cost_map_url() without return types