docstr: TS Sequential DataFrame: Working but SLOW implementation
docstr_tok: ["TS","Sequential","DataFrame",":","Working","but","SLOW","implementation"]
code: def test_td_seq_ext(self):
      """TS Sequential DataFrame: Working but SLOW implementation"""
      self.data.ta.td_seq(show_all=False, append=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(
          list(self.data.columns[-2:]), ["TD_SEQ_UP", "TD_SEQ_DN"]
      )
  
      self.data.ta.td_seq(show_all=True, append=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(
          list(self.data.columns[-2:]), ["TD_SEQ_UPa", "TD_SEQ_DNa"]
      )
  
imports: from .config import sample_data
  from .context import pandas_ta
  from unittest import skip, TestCase
  from pandas import DataFrame
label_desc: Use image node_id 42 for calling the TestMomentumExtension obj's underlying member method code with example usage: obj.test_td_seq_ext() without return types