code: def setUp(self):
      super(TestUpdatedDefaultMaxLen, self).setUp()
      self.__default_max_len = dataseries.DEFAULT_MAX_LEN
      dataseries.DEFAULT_MAX_LEN = 2048
  
imports: import datetime
  from six.moves import xrange
  from .None import common
  from pyalgotrade import dataseries
  from pyalgotrade.dataseries import bards
  from pyalgotrade.dataseries import aligned
  from pyalgotrade import bar
label_desc: Use image node_id 1 for calling the TestUpdatedDefaultMaxLen obj's underlying member method code with example usage: obj.setUp() without return types