message: fixing issue for python2
diff: import duckdb
  -import urllib.request
  try:
  import pyarrow
  import pyarrow.parquet
  - has_arrow = True
  + import urllib.request
  +
  + can_run = True
  except:
  - has_arrow = False
  + can_run = False
  class TestArrow(object):
  def test_arrow(self, duckdb_cursor):
  - if not has_arrow:
  + if not can_run:
  return
  parquet_filename = 'userdata1.parquet'
  