[Python-Dev] Odd compile errors for bad genexps (original) (raw)

Raymond Hettinger python at rcn.com
Thu Sep 30 02:40:42 CEST 2004

[Tim] > >>> (i for i in x) = 2 > SystemError: assign to generator expression not possible > > 1. Why is that a SystemError instead of a SyntaxError? SystemError > doesn't make sense. . . . > >>> (i for i in x) += 2 > SyntaxError: augmented assign to tuple literal not possible > > 3. That's not a tuple literal

Okay, those two are fixed.

> 2. Why didn't it echo the offending line?

The code for com_error() screens out the line numbering when in the interactive mode. You get the full echo when running a script.

What is interesting is that some syntax errors ("2 & * 3" for example) by-pass com_error() and echo the line with a caret pointing at the offending token.

These are both probably as they should be.

Raymond

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