Hi, What you want is achieved by the Python built-in filter() function: https://docs.python.org/3.8/library/functions.html#filter Best, Tiago Am 30.10.19 um 14:45 schrieb Gerion Entrup:

Hi,

I often have this pattern in Python:

``` for vertex in mygraph.vertices(): if not mygraph.vp.is_foo[vertex]: continue do_stuff_that_uses_all_vertices() ```

`is_foo` is a boolean property.

I know that there a vertex filters and GraphViews but in the loop body I need access to all vertices. Only the iterator should be filtered.

Is there a way to specify a vertex filter only in the vertices iterator? Something like: ``` for vertex in mygraph.vertices(vfilt=mygraph.vp.is_foo): do_stuff_that_uses_all_vertices() ```

Of course, this would be nice in all iterators (edges(), out_edges(), ...) ;).

Best, Gerion

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