code: def testGetFirstMonday(self):
      self.assertEquals(
          dt.get_first_monday(2010), datetime.date(2010, 1, 4)
      )
      self.assertEquals(
          dt.get_first_monday(2011), datetime.date(2011, 1, 3)
      )
  
imports: import datetime
  from six.moves import xrange
  from .None import common
  from pyalgotrade import utils
  from pyalgotrade.utils import collections
  from pyalgotrade.utils import dt
label_desc: Use image node_id 3 for calling the DateTimeTestCase obj's underlying member method code with example usage: obj.testGetFirstMonday() without return types