Mike Fährmann 9b21d3f13c add '--filter' command-line option ...

This allows for image filtering via Python expressions by the same
metadata that is also used to build filenames (--list-keywords).

The usually shunned eval() function is used to evaluate
filter-expressions, but it seemed quite appropriate in this case and
shouldn't introduce any new security issues, as any attacker that could do
> gallery-dl --filter "delete-everything()" ...
could as well do
> python -c "delete-everything()"

2017-09-08 17:52:00 +02:00

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