print: flush stdout to avoid buffering

seiscat/print.py

@@ -9,6 +9,7 @@
  GNU General Public License v3.0 or later
  (https://www.gnu.org/licenses/gpl-3.0-standalone.html)
 """
+import sys
 from .db import read_fields_and_rows_from_db, get_catalog_stats
 from .utils import err_exit
 
@@ -51,6 +52,7 @@ def _print_catalog_table(config, eventid=None, version=None):
  val = 'None' if val is None else val
  print(f'{val:{max_len[i]}}', end=' ')
  print()
+ sys.stdout.flush()
 
 
 def _print_catalog_csv(config, eventid=None, version=None):
@@ -72,6 +74,7 @@ def _print_catalog_csv(config, eventid=None, version=None):
  for row in sorted(
  rows, key=lambda r: (r[time_idx], r[ver_idx]), reverse=reverse):
  print(','.join([str(val) for val in row]))
+ sys.stdout.flush()
 
 
 def print_catalog(config):