code: def setUp(self):
      self.trading_day = get_calendar("NYSE").day
  
      self.nsids = 5
      self.ndates = 20
  
      self.sids = Int64Index(range(self.nsids))
      self.dates = DatetimeIndex(
          start="2014-01-02",
          freq=self.trading_day,
          periods=self.ndates,
      )
  
      self.mask = ones((len(self.dates), len(self.sids)), dtype=bool)
  
file_path: zipline/tests/pipeline/test_frameload.py
imports: from unittest import TestCase
  from mock import patch
  from numpy import arange, ones
  from numpy.testing import assert_array_equal
  from pandas import DataFrame, DatetimeIndex, Int64Index
  from trading_calendars import get_calendar
  from zipline.lib.adjustment import ADD, Float64Add, Float64Multiply, Float64Overwrite, MULTIPLY, OVERWRITE
  from zipline.pipeline.data import USEquityPricing
  from zipline.pipeline.domain import US_EQUITIES
  from zipline.pipeline.loaders.frame import DataFrameLoader
label_desc: Use image node_id 1 for calling the DataFrameLoaderTestCase obj's underlying member method code with example usage: obj.setUp() without return types