[Python-ideas] SyntaxWarning for for/while/else without break or return?

[Georg Brandl]

Steven D'Aprano schrieb:

> And ridiculously:
> 
>>>> assert (1, 2), "error"
> <stdin>:1: SyntaxWarning: assertion is always true, perhaps remove 
> parentheses?
> 
> Why single out always-true tuples for a warning, when other always-true 
> items are considered legitimate, even when there is no ambiguity about 
> what the programmer meant? This sort of inconsistency makes little 
> sense and should stand as a cautionary tale for people putting warnings 
> in the compiler: sometimes the warning is *bad advice*:
> 
>>>> assert 1, 2, "error"  # remove the () like the compiler said
>   File "<stdin>", line 1
>     assert 1, 2, "error"  # remove the () like the compiler said
>                ^
> SyntaxError: invalid syntax

This would be a problem indeed if programmers were computers.  Last time
I looked they were humans, and capable of not blindly following any
instruction the computer gives them. [1]

And even if they do, they obviously don't know how the assert statement
works, and need to revisit the docs.

Georg

[1] Note, only speaking of programmers here ;)


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