code: def test_tos_sdtevall(self):
      result = pandas_ta.tos_stdevall(self.close)
      self.assertIsInstance(result, DataFrame)
      self.assertEqual(result.name, "TOS_STDEVALL")
      self.assertEqual(len(result.columns), 7)
  
      result = pandas_ta.tos_stdevall(self.close, length=30)
      self.assertIsInstance(result, DataFrame)
      self.assertEqual(result.name, "TOS_STDEVALL_30")
      self.assertEqual(len(result.columns), 7)
  
      result = pandas_ta.tos_stdevall(
          self.close, length=30, stds=[1, 2]
      )
      self.assertIsInstance(result, DataFrame)
      self.assertEqual(result.name, "TOS_STDEVALL_30")
      self.assertEqual(len(result.columns), 5)
  
imports: from .config import error_analysis, sample_data, CORRELATION, CORRELATION_THRESHOLD, VERBOSE
  from .context import pandas_ta
  from unittest import skip, TestCase
  import pandas.testing
  from pandas import DataFrame, Series
  import talib
label_desc: Use image node_id 12 for calling the TestStatistics obj's underlying member method code with example usage: obj.test_tos_sdtevall() without return types