From 8daea7f1265ddcce67d28258068a25666954000f Mon Sep 17 00:00:00 2001
From: Simon Willison <swillison@gmail.com>
Date: Wed, 6 Nov 2019 20:27:11 -0800
Subject: [PATCH] Handle empty lists

---
 sqlite_utils/db.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sqlite_utils/db.py b/sqlite_utils/db.py
index a51bba7..d44b238 100644
--- a/sqlite_utils/db.py
+++ b/sqlite_utils/db.py
@@ -977,7 +977,10 @@ class Table(Queryable):
         # we need to adjust the batch_size down if we have too many cols
         records = iter(records)
         # Peek at first record to count its columns:
-        first_record = next(records)
+        try:
+            first_record = next(records)
+        except StopIteration:
+            return self  # It was an empty list
         num_columns = len(first_record.keys())
         assert (
             num_columns <= SQLITE_MAX_VARS