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@conorpp conorpp commented May 19, 2017

This prevents collisions with python keywords which would cause a syntax error when executing it later. I ran into this when I loaded a openscad function containing an argument "or".

@bil-bas
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bil-bas commented Jul 21, 2018

It is usual, in Python, to append _ to avoid name collisions. Prepended _ indicates that something is "protected".

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2 participants