Yes, it's a wart. You learn the patterns he mentions pretty quickly. | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		spenrose on Feb 20, 2011 \| parent \| context \| favorite \| on: Python's Mutable Default Problem Yes, it's a wart. You learn the patterns he mentions pretty quickly.

code_duck on Feb 20, 2011 [–]

I knew the pattern well from other languages, but would have assumed that it wasn't necessary in Python. So, this is good to note.

Consider applying for YC's Summer 2026 batch! Applications are open till May 4
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact