code: def test_bcolz_write_minute_past(self):
      start = pd.to_datetime("2015-04-01 00:00")
      end = pd.to_datetime("2015-04-30 23:59")
      freq = "minute"
  
      df = self.generate_df("bitfinex", freq, start, end)
  
      writer = BcolzExchangeBarWriter(
          rootdir=self.root_dir,
          start_session=start,
          end_session=end,
          data_frequency=freq,
          write_metadata=True,
      )
  
      data = []
      data.append((1, df))
      writer.write(data)
  
      pass
  
imports: import random
  import shutil
  import tempfile
  import pandas
  from nose.tools import assert_equals
  from catalyst.exchange.exchange_bcolz import BcolzExchangeBarWriter, BcolzExchangeBarReader
  from catalyst.exchange.exchange_bundle import ExchangeBundle
  from catalyst.exchange.utils.bundle_utils import get_df_from_arrays
label_desc: Use image node_id 7 for calling the TestBcolzWriter obj's underlying member method code with example usage: obj.test_bcolz_write_minute_past() without return types