What’s the Most Common Python Error You’ve Faced?

In my 20+ years of experience, I often make mistakes when calling methods with out-of-order arguments. Sometimes I just get too lazy to pass them as keyword arguments, and it's always my fault since I wrote those methods!

With about 4 years of Python experience, I’d say environment issues are a major pain for everyone. A lot of people appreciate tools like virtual environments since they help eliminate these headaches. Additionally, dealing with untyped languages can lead to unexpected behaviors, especially when you're not handling inputs properly.

After nearly a decade in the field, I’ve found that mocking functions in the wrong scope often causes confusion and issues. It’s a common pitfall I've encountered.

Typos can get me so much! I really depend on having spellcheck in my IDE to help catch those mistakes.

I'm not a developer, but I make Python scripts to automate my tasks. One frequent mistake I make is trying to chain in-place list methods, which return None. I end up getting errors like "None type has no method named XXXX" because I forget about that.

With over 20 years in programming, one of the slip-ups I see often is using mutable default arguments in functions. It’s a tricky thing where the default mutable gets modified, leading to unexpected behavior later on.