code: def test_widget_client_np(self, rename_libraries):
      import perspective
  
      assert perspective.is_libpsp() is False
      data = {"a": np.arange(0, 50)}
      widget = perspective.PerspectiveWidget(data)
      assert hasattr(widget, "table") is False
      assert widget._data == {"a": [i for i in range(50)]}
  
imports: import os
  import pytest
  import sys
  import numpy
  import pandas
  from datetime import date, datetime
  from functools import partial
  from types import MethodType
label_desc: Use image node_id 2 for calling the TestClient obj's underlying member method code with example usage: obj.test_widget_client_np(rename_libraries) without return types