code: def test_removeprefix(self):
      x = "model.keras"
      self.assertEqual(python_utils.removeprefix(x, "model"), ".keras")
      self.assertEqual(python_utils.removeprefix(x, ".keras"), x)
  
file_path: keras/keras/utils/python_utils_test.py
imports: import base64
  import marshal
  from keras import testing
  from keras.utils import python_utils
label_desc: Use image node_id 3 for calling the PythonUtilsTest obj's underlying member method code with example usage: obj.test_removeprefix() without return types