code: def test_widget_pass_index(self):
      data = {"a": [1, 2, 3, 1]}
      widget = PerspectiveWidget(data, index="a")
      assert widget.table.size() == 3
  
imports: from datetime import date, datetime
  from functools import partial
  from types import MethodType
  import numpy
  from perspective import PerspectiveError, PerspectiveWidget, Table
  from pytest import raises
label_desc: Use image node_id 16 for calling the TestWidget obj's underlying member method code with example usage: obj.test_widget_pass_index() without return types