what does 'for _ in range()' mean?

[Erik Max Francis]

John Roth wrote:

> What convention? I have to agree with a couple
> of other posters; I've never heard of it before.
> 
> If it really is a convention, it would be nice to have it
> documented somewhere (like the single underscore
> in front of a variable means "weak internal use").
> Somewhere is most likely PEP 8 - the Python
> Style Guide.

A convention doesn't need to have official sanction to be a convention.

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