it works

.gitignore

@@ -1,3 +1,3 @@
 /target
-cards.db
+cards.db*
 all_cards*

database-update.py

@@ -1,10 +1,15 @@
 #!/bin/python
-
+import sys
 # import urllib library
 from urllib.request import urlopen
-  
+
 # import json
 import json
+import naya
+
+# import sqlite utils library
+from sqlite_utils import Database
+
 # store the URL in url as 
 # parameter for urlopen
 url = "https://api.scryfall.com/bulk-data"
@@ -28,10 +33,14 @@ for file in data_json["data"]:
 
 CHUNK = 256 * 1024
 
+db = Database("cards.db", recreate=True)
+db.enable_wal()
+cards = db["cards"]
+
 for file in bulk_files:
     uri = file["download_uri"]
     filename = file["type"]+"_"+file["id"]+".json"
-
+    print("Downloading {} ...".format(uri))
     rep = urlopen(uri)
     with open(filename, 'wb') as f:
         while True:
@@ -39,4 +48,16 @@ for file in bulk_files:
             if not chunk:
                 break
             f.write(chunk)
-    
+    print("Updating cards.db ...\n")
+    numcard = 0
+    with open(filename, "r") as f:
+        rawjson = naya.stream_array(naya.tokenize(f))
+        batch = []
+        for card in rawjson:
+            batch.append(card)
+            if len(batch) == 512:
+                cards.insert_all(batch,alter=True,pk="id",batch_size=512)
+                batch = []
+                sys.stdout.write("Adding card {} \r".format(numcard))
+            numcard+=1
+    print("\n")