Display the number of retries

Author: zanieb

pythonbuild/utils.py

@@ -310,7 +310,7 @@ def download_to_path(url: str, path: pathlib.Path, size: int, sha256: str):
             print(f"urllib error on {url}; retrying: {e}")
             time.sleep(2**attempt)
     else:
-        raise Exception("download failed after multiple retries: %s" % url)
+        raise Exception(f"download failed after {attempt} retries: {url}")
 
     tmp.rename(path)
     print("successfully downloaded %s" % url)