末尾に,があると上手く動かないのを修正

app.py

@@ -40,7 +40,7 @@ i2n, i2c, n2i, entries = load_database()
 def greet(query):
     results = []
     errors = []
-    target_tags = [x.strip().replace(" ", "_") for x in query.split(",")]
+    target_tags = [x.strip().replace(" ", "_") for x in query.split(",") if x]
     target_ids = set()
     for tag_name in target_tags:
         try:
@@ -54,7 +54,8 @@ def greet(query):
         rates = []
         matched_entries = list(filter(lambda entry: target_ids.issubset(entry), entries))
         print(len(matched_entries))
-        if len(matched_entries) > 5000:
+        MAX_MATCHED_ENTRIES = 5000
+        if len(matched_entries) > MAX_MATCHED_ENTRIES:
             results.append(['Too many {} entries have been matched. <br>Please change or increase tags for reduce matches.'.format(len(matched_entries)), -1])
         else:
             results.append(['{} entries have been matched.'.format(len(matched_entries)), -1])