old_contents: #!/usr/bin/env python3
  """
  yes, this is python 3 ONLY project
  """
  
  from __future__ import print_function
  
  import sys
  
  # let's be so gentle and print the error message even on python 2
  
  if sys.version_info.major <= 2:
      error_message = """\
  It looks like you are running sen with python 2. I'm sorry but sen is a python 3 only project.
  Please see installation steps at official project page:
  
  https://github.com/TomasTomecek/sen"""
      print(error_message, file=sys.stderr)
      sys.exit(2)
  
  import argparse
  import logging
  
  from sen import set_logging
  from sen.exceptions import TerminateApplication
  from sen.tui.init import UI
  from sen.util import get_log_file_path, log_vars_from_tback, setup_dirs
  
  
  logger = logging.getLogger("sen")
  
  
  def main():
      parser = argparse.ArgumentParser(
          description="Terminal User Interface for Docker Engine"
      )
      exclusive_group = parser.add_mutually_exclusive_group()
      exclusive_group.add_argument("--debug", action="store_true", default=None)
  
      args = parser.parse_args()
  
      if args.debug:
          set_logging(level=logging.DEBUG, path=get_log_file_path())
      else:
          set_logging(level=logging.INFO, path=setup_dirs())
  
      logger.info("application started")
  
      try:
          ui = UI()
      except TerminateApplication as ex:
          print("Error: {0}".format(str(ex)), file=sys.stderr)
          return 1
  
      try:
          ui.run()
      except KeyboardInterrupt:
          print("Quitting on user request.")
          return 1
      # except AssertionError as ex:
          # if ex.args[0] == "rows, render mismatch":
          #     logger.error("race condition happened")
          #     # restart the ui
          #     # # continue
      #    return 2
      except Exception as ex:  # pylint: disable=broad-except
          log_vars_from_tback(process_frames=3 if args.debug else 0)  # show complete stack trace
          if args.debug:
              raise
          else:
              # TODO: improve this message to be more thorough
              print("There was an error during program execution, see logs for more info.")
              return 1
      return 0
  
  
  if __name__ == "__main__":
      sys.exit(main())
  
new_contents: #!/usr/bin/env python3
  """
  yes, this is python 3 ONLY project
  """
  
  from __future__ import print_function
  
  import sys
  
  # let's be so gentle and print the error message even on python 2
  
  if sys.version_info.major <= 2:
      error_message = """\
  It looks like you are running sen with python 2. I'm sorry but sen is a python 3 only project.
  Please see installation steps at official project page:
  
  https://github.com/TomasTomecek/sen"""
      print(error_message, file=sys.stderr)
      sys.exit(2)
  
  import argparse
  import logging
  
  from sen import set_logging
  from sen.exceptions import TerminateApplication
  from sen.tui.init import UI
  from sen.util import get_log_file_path, log_vars_from_tback, setup_dirs
  
  
  logger = logging.getLogger("sen")
  
  
  def main():
      parser = argparse.ArgumentParser(
          description="Terminal User Interface for Docker Engine"
      )
      exclusive_group = parser.add_mutually_exclusive_group()
      exclusive_group.add_argument("--debug", action="store_true", default=None)
  
      args = parser.parse_args()
  
      if args.debug:
          set_logging(level=logging.DEBUG, path=get_log_file_path())
      else:
          set_logging(level=logging.INFO, path=get_log_file_path())
  
      logger.info("application started")
  
      try:
          ui = UI()
      except TerminateApplication as ex:
          print("Error: {0}".format(str(ex)), file=sys.stderr)
          return 1
  
      try:
          ui.run()
      except KeyboardInterrupt:
          print("Quitting on user request.")
          return 1
      # except AssertionError as ex:
          # if ex.args[0] == "rows, render mismatch":
          #     logger.error("race condition happened")
          #     # restart the ui
          #     # # continue
      #    return 2
      except Exception as ex:  # pylint: disable=broad-except
          log_vars_from_tback(process_frames=3 if args.debug else 0)  # show complete stack trace
          if args.debug:
              raise
          else:
              # TODO: improve this message to be more thorough
              print("There was an error during program execution, see logs for more info.")
              return 1
      return 0
  
  
  if __name__ == "__main__":
      sys.exit(main())
  
subject: fix log path when not verbose