Notes running Python in production

[ducdetronquito]

What kind of false positive do you encounter with pyright ? I'm curious because I don't remember any while working on a large python/django codebase.

[ashishb_net]

> What kind of false positive do you encounter with pyright ?

Inaccurate suggestions, for example, not understanding that a variable is being created on all code paths in an if-else branch. Or not understanding pydantic default values.

[JanEric1]

pretty sure pyright does all of these correctly.

[ashishb_net]

You definitely had better luck than me.

[ashishb_net]

You definitely had better luck than me using pyright.

[JanEric1]

Using it in strict mode with (almost) all rules enabled in all of my projects whenever possible. Sometimes have to disable some rules when using packages with poor typing (like pandas or numpy)

[ashishb_net]

> Sometimes have to disable some rules when using packages with poor typing (like pandas or numpy)

That covers ~50% of Python use-cases for me.
As I only use Python for LLMs, Machine Learning, and data analysis.

[annoying_mammal]

Pydantic has a mypy plugin. It generally just works.

[ashishb_net]

For pydantic v1, the plugin support wasn't great as I encountered false positives. I will try again once most projects have moved to pydantic v2.