From f33a4215739183cce3ba8d92af09d319dde64dba Mon Sep 17 00:00:00 2001
From: Josh Whittick <92024297+joshwhittick@users.noreply.github.com>
Date: Mon, 21 Jul 2025 21:40:25 +0100
Subject: [PATCH] Update fetch-rates.py

Check data is a list before trying to use it so it doesn't crash completely
---
 fetch-rates.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/fetch-rates.py b/fetch-rates.py
index 4ad5bce21..b9362afe4 100644
--- a/fetch-rates.py
+++ b/fetch-rates.py
@@ -44,9 +44,15 @@ def fetch_all_data():
     for n in range(1, 70):
         page_file = os.path.join(data_dir, f"coin_data_{n}.json")
         with open(page_file, "r", encoding="utf-8") as f:
-            data = json.load(f)
-            merged_data.extend(data)
-    
+            try:
+                data = json.load(f)
+                if isinstance(data, list):
+                    merged_data.extend(data)
+                else:
+                    print(f"Warning: {page_file} did not contain a list. Skipping.")
+            except json.JSONDecodeError:
+                print(f"Warning: {page_file} could not be decoded. Skipping.")
+
     merged_data = [item for item in merged_data if item.get('current_price') is not None]
 
     with open(full_rates_file, "w", encoding="utf-8") as f: