Prevent from saving an empty .cache file.

diff --git a/src/Hage1/cachefile.py b/src/Hage1/cachefile.py
index 4c5bcdf..901994a 100644 (file)
--- a/src/Hage1/cachefile.py
+++ b/src/Hage1/cachefile.py
@@ -85,6 +85,10 @@ def save_cache(bbs, board, dic):
     dic: dictionary of thread id and metadata dictionary
     which key is in metadata_namelist
     """
+    # nothing to do if dic is empty
+    if not dic:
+        return
+
     cachefile_path = misc.get_board_cache_path(bbs, board)
 
     # create a directroy where .cache file is if not exists