code: def test_table_infer_bool(self):
      data = {"a": [None, None, None, None, True, True, True]}
      tbl = Table(data)
      assert tbl.schema() == {"a": bool}
  
imports: from datetime import date, datetime
  from perspective.table import Table
  from pytest import mark
label_desc: Use image node_id 6 for calling the TestTableInfer obj's underlying member method code with example usage: obj.test_table_infer_bool() without return types