text: import pandas as pd
  
  
  class DataFrame(pd.DataFrame):
      def __init__(self, data=None, index=None, columns=None, dtype=None, copy=False):
          super().__init__(data=data, index=index, columns=columns, dtype=dtype, copy=copy)
          pd.set_option('display.max_columns', 50)
  
      def xtset(self, id=None, time=None):
          self.id = id
          self.time = time
  