code: def __testGetValue(self, ds, itemCount, value):
      for i in xrange(0, itemCount):
          self.assertTrue(ds[i] == value)
  
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 4 for calling the TestBarDataSeries obj's underlying member method code with example usage: obj.__testGetValue(ds, itemCount, value) without return types