For no-effort debugging questions (VTC as "needs more focus" or "needs debugging details" as appropriate):

Welcome to Stack Overflow. Please read [ask]. We do not find the bug for you here; we require a **specific question**. If there is something wrong with existing code, this question will come out of your best attempt to [understand](https://meta.stackoverflow.com/questions/261592/) and [locate](https://ericlippert.com/2014/03/05/how-to-debug-small-programs/) a specific problem, and showcase it in a [mre]. It [is not possible to "help you"](https://meta.stackoverflow.com/questions/284236/) as this is **not a discussion forum**.

Boilerplate comment warning for questions and answers that make inappropriate use of eval and/or exec in Python:

**[Do not ever use `eval` (or `exec`) on data that could possibly come from outside the program in any form. It is a critical security risk. You allow the author of the data to run arbitrary code on your computer](https://stackoverflow.com/questions/1832940/why-is-using-eval-a-bad-practice). It [cannot easily be sandboxed, and proper sandboxing is harder than using a proper tool for the job.](https://stackoverflow.com/questions/3068139)**

SEDE query to help Mjollnir-wielders re-link duplicates directly to a canonical:

https://data.stackexchange.com/stackoverflow/query/1704180