René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Prevent --browser from opening when no report is generated","articleBody":"# Bug report\n\n### Bug description:\n\nWhen profiling a script that does not produce HTML output, the following warning is displayed:\n`Warning: No functions found in profiling data. Check if sampling captured any data.`\nHowever, when the `--browser` option is specified, the program still attempts to open the output file in a browser.\n\n```\n./python -m profiling.sampling run --flamegraph --browser script.py\n```\n\n```python\n# script.py\nprint(\"hello world\")\n```\n\n## Suggested Fix\n\n\n```diff\ndiff --git a/Lib/profiling/sampling/cli.py b/Lib/profiling/sampling/cli.py\nindex f4b31aad45b..75a21429705 100644\n--- a/Lib/profiling/sampling/cli.py\n+++ b/Lib/profiling/sampling/cli.py\n@@ -607,6 +607,10 @@ def _open_in_browser(path):\n     \"\"\"\n     abs_path = os.path.abspath(path)\n \n+    if not os.path.exists(abs_path):\n+        print(f\"Warning: Could not find {abs_path}\", file=sys.stderr)\n+        return\n+\n     # For heatmap directories, open the index.html file\n     if os.path.isdir(abs_path):\n         index_path = os.path.join(abs_path, 'index.html')\n```\n\nI can open a PR with a proposed fix\n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\nLinux\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-145339\n* gh-150017\n* gh-152447\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/misa-j","@type":"Person","name":"misa-j"},"datePublished":"2026-02-27T10:05:51.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/145306/cpython/issues/145306"}