[xandkar]

That is all fine if you're the only one that needs to understand that code. Otherwise you're wasting other people's time and sanity. Unless, of course, it all works for everyone, in which case carry on. At least until a new-enough team member arrives and starts pulling their hair out :)

[jean_valje4n]

Data Science is all about writing shitty code. Most of the time you're just digging for data in a notebook, and then you can write things out proper once you've got something that could work.

[laserlight]

I guess we can distinguish between programming and prototyping. Prototyping is more forgiving because it has narrower scope and spans shorter time. Even then, bad habits tend to carry on to the programming part. So better be deliberate about it.