[JimDabell]

I've been writing Python for over 20 years, and I don't think this has happened to me one single time. I'm not some kind of super programmer; I make as many mistakes as anybody else and spend too long debugging stupid mistakes occasionally.

I've mixed spaces and tabs before on a handful of occasions, and it's always told me straight away what the problem is.

Here is an example of mixed spaces and tabs for indentation:

https://repl.it/repls/NegativeExemplaryBackups

You'll see that it raises an error:

    TabError: inconsistent use of tabs and spaces in indentation

…and points you to the exact line with a problem.

[hackinthebochs]

Here's an example of an incomprehensible error related to mixing whitespace, where its not obvious its a mixed whitespace issue:

https://repl.it/repls/MotionlessLustrousScan

[JimDabell]

Are we seeing the same thing?

    IndentationError: unindent does not match any outer indentation level

The very first thing I would look at is the indentation if I got an error like that. You hardly need to "spend an hour trying to debug a nonsensical error" when you see an error like that.

[hackinthebochs]

Does "indentation error" immediately scream check for a whitespace mismatch to you? Because it doesn't to me.

[JimDabell]

"Indentation error" screams "fix the indentation", and code is indented with whitespace, so yeah.

When something tells you "indentation error", where's the first place you would look, if not the indentation? When you know you have a problem with the indentation, what do you think you have to change, if not the whitespace? There isn't a lot of opportunity to go in the wrong direction here.

Don't get me wrong, Python definitely has unexpected, difficult to debug behaviour for newbies (e.g. mutable default arguments). But this in particular isn't one of them. This is 2+2=4 level stuff.

[hackinthebochs]

This is a strange response. The only thing I can say is that "indentation issues" does not imply "mixed whitespace issues". Your responses are implicitly conflating the two.

>what do you think you have to change, if not the whitespace?

Note that the same error shows up when you have an inconsistent number of spaces to indent a block.

[JimDabell]

> > What do you think you have to change, if not the whitespace?

> Note that the same error shows up when you have an inconsistent number of spaces to indent a block.

And what would the solution to that be, if not changing the whitespace?

Every single piece of information available is strongly pointing in the same direction here.

[hackinthebochs]

It's nice when it does offer that specific error, but I've burned many hours over the years when it fails to recognize that as the issue.