replace braces in logging statements

lib/OperationalLogger.py

@@ -262,9 +262,10 @@ def setup(config_file=None, logger_name=None, log_filename=None, log_root_dir=No
 #        log_format_console=log_format_console, date_format_console=date_format_console
 #    )
     logger = OperationalLogger(**config)
-    logging.info('Logging output from: {}'.format(' '.join(sys.argv)))
+    logging.info('=' * 60)
+    logging.info('Logging output from: %s', ' '.join(sys.argv))
     logging.info('Log writing to: %s', config['log_filename'])
-    logging.info('Process id {}, parent process id {}'.format(os.getpid(), os.getppid()))
+    logging.debug('Process id %d, parent process id %d', os.getpid(), os.getppid())
     logging.info('-' * 60)
     #if notify:
     atexit.register(__exit_handler, logger, config['notify'])
@@ -313,8 +314,8 @@ def log_shell(arg_list, raise_err=False, return_output=False, **kwargs):
     return_output: (like subprocess.check_output) returns any output
                    from shell call instead of the exit code
     """
-    logging.info('Spawning child process from pid={}'.format(os.getpid()))
-    logging.info('Executing: {}'.format(' '.join(arg_list)))
+    logging.info('Spawning child process from pid=%d', os.getpid())
+    logging.info('Executing: %s', ' '.join(arg_list))
     try:
         my_name = os.path.basename(inspect.getfile(inspect.currentframe()))
         for f in inspect.stack():
@@ -332,10 +333,10 @@ def log_shell(arg_list, raise_err=False, return_output=False, **kwargs):
         return_code = proc.wait()
         if return_code:
             if raise_err:
-                logging.error('{} failed with exit code {}'.format(' '.join(arg_list), return_code))
+                logging.error('%s failed with exit code %d', ' '.join(arg_list), return_code)
                 raise RuntimeError('{} failed with exit code {}'.format(' '.join(arg_list), return_code))
             else:
-                logging.warning('{} failed with exit code {}'.format(' '.join(arg_list), return_code))
+                logging.warning('%s failed with exit code %d', ' '.join(arg_list), return_code)
                 return proc_output if return_output else return_code
     except OSError as err:
         logging.error('Error while executing %s: %s', ' '.join(arg_list), str(err))