All leading tabs or all leading spaces - why isn't that enforced?

Steve Holden steve at
Tue Aug 7 05:52:43 CEST 2007

John Nagle wrote:
>    One can argue over tab vs. space indentation, but mixing the two
> is just wrong.  Why not have CPython report an error if a file has
> both leading tabs and leading spaces?  I know that was proposed at
> some point, but I don't think it ever went in. That would catch a
> common error introduced during maintenance.
I suppose we Pythonistas are just too permissive for our own good. 
Consider the opportunity to use mixed tabs and spaces a piece of rope of 
your preferred length ...

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