class_docstr: Donchian Channel
  
  https://www.investopedia.com/terms/d/donchianchannels.asp
  
  Args:
      high(pandas.Series): dataset 'High' column.
      low(pandas.Series): dataset 'Low' column.
      close(pandas.Series): dataset 'Close' column.
      window(int): n period.
      fillna(bool): if True, fill nan values.
class_docstr_tok: ["Donchian","Channel","https",":","\/\/www.investopedia.com\/terms\/d\/donchianchannels.asp","Args",":","high","(","pandas.Series",")",":","dataset","'High","'","column",".","low","(","pandas.Series",")",":","dataset","'Low","'","column",".","close","(","pandas.Series",")",":","dataset","'Close","'","column",".","window","(","int",")",":","n","period",".","fillna","(","bool",")",":","if","True",",","fill","nan","values","."]
code: def _run(self):
      self._min_periods = 1 if self._fillna else self._window
      self._hband = self._high.rolling(
          self._window, min_periods=self._min_periods
      ).max()
      self._lband = self._low.rolling(
          self._window, min_periods=self._min_periods
      ).min()
  
imports: import numpy
  import pandas
  from ta.utils import IndicatorMixin
label_desc: Use image node_id 2 for calling the DonchianChannel obj's underlying member method code with example usage: obj._run() without return types