code: def test_pat020_patch_pickle():
      import pickle
  
      p = Patch()
      p["a"] = "a"
      data = pickle.dumps(p)
      q = pickle.loads(data)
  
      assert patch_to_dict(p) == patch_to_dict(q)
  
imports: import json
  import pytest
  from dash import Patch
  from dash._utils import to_json
label_desc: Use image node_id 21 for calling a global function with example usage: test_pat020_patch_pickle() without return types