Update app.py

app.py

@@ -71,12 +71,13 @@ def merge_models() -> None:
     """
     command = ["mergekit-yaml", "config.yaml", "merge", "--copy-tokenizer", "--allow-crimes", "--out-shard-size", "1B", "--lazy-unpickle"]
 
-    try:
-        result = subprocess.run(command, check=True, stdout="output.log",
-                                stderr="output.log", text=True)
-        print(f"mergekit: {result.stdout}")
-    except subprocess.CalledProcessError as e:
-        print(f"mergekit: {e.stderr}")
+    with open("output.log", "a") as log_file: 
+        try:
+            result = subprocess.run(command, check=True, stdout=log_file,
+                                    stderr=log_file, text=True)
+            print(f"mergekit: {result.stdout}")
+        except subprocess.CalledProcessError as e:
+            print(f"mergekit: {e.stderr}")
 
 
 def make_df(file_path: str, n_rows: int) -> pd.DataFrame: