don't waste bandwidth

vox_celeb.py

@@ -291,15 +291,18 @@ class VoxCeleb(datasets.GeneratorBasedBuilder):
                 with catch_warnings():
                     filterwarnings("ignore", category=InsecureRequestWarning)
                     head = requests.get(url.format(key=cred_key), verify=False, timeout=5, stream=True)
-                if head.status_code == 401:
-                    raise ValueError("failed to authenticate with VoxCeleb host")
-                if head.status_code < 200 or head.status_code >= 300:
-                    raise ValueError("failed to fetch dataset")
-                save_credentials()
-                content_length = head.headers.get("Content-Length")
-                if content_length is None:
-                    raise ValueError("expected non-empty Content-Length")
-                content_length = int(content_length)
+                try:
+                    if head.status_code == 401:
+                        raise ValueError("failed to authenticate with VoxCeleb host")
+                    if head.status_code < 200 or head.status_code >= 300:
+                        raise ValueError("failed to fetch dataset")
+                    save_credentials()
+                    content_length = head.headers.get("Content-Length")
+                    if content_length is None:
+                        raise ValueError("expected non-empty Content-Length")
+                    content_length = int(content_length)
+                finally:
+                    head.close()
                 tmp_path = Path(path + "." + sha256(url.encode("utf-8")).hexdigest())
                 tmp_paths.append(tmp_path)
                 lengths.append(content_length)