Python filter type problem

[newshunhk]

Hi,
I am stuck here, as I want to filter only line from python script. I already used GetType() for the following result:

Thanks!!!

[Alien]

If you want 0 index from that list try typing:

a[2][0];

into the codeblock

[c.poupin]

An example

[newshunhk]

thank a lot!!!

[newshunhk]

I have another problem, how can I keep list L3 and flatten the rest in python?

[newshunhk]

I tried to use flatten in python
List.Flatten(t1@@L3<1>, -1)
but seems I have warning for the @

[Alien]

Flatten list with python

Me again I’m trying to flatten a list in python, I’ve tried it several ways: [image] Then I checked these forums and found this method but it doesn’t work for me: [image] I’m feeding in a list of points and I’d like the list flattened so the python looks like the List.Flatten node. Traceback (most recent call last): File “”, line 10, in TypeError: Point is not iterable<< Was the error from the 2nd screenshot. How do I do this?

Dunno if that’ll help?

[Alien]

Oh and this:

Flatten in Python - breaking

Ages ago I got this code from this forum and it’s always worked well. It still works well with numbers but if I feed it stings it crashes. Any idea why? [image] # Load the Python Standard and DesignScript Libraries import sys import clr import collections def flattenList(unflattened_list): if isinstance(unflattened_list,collections.Iterable): return [sub_element for element in unflattened_list for sub_element in flattenList(element)] else: return [unflattened_list…

[newshunhk]

yes it helps
but I want to keep L3 level after flatten in python too

[Alien]

Best to start a new thread btw.

[Daan]

There isn’t really a need to do this with Python.
Check out List.RemoveIfNot, it’s OOTB and does exactly what you want

For the type input use something like this: Autodesk.DesignScript.Geometry.Line

[c.poupin]

[quote=“Daan, post:11, topic:74745”]
There isn’t really a need to do this with Python.
Check out List.RemoveIfNot , it’s OOTB and does exactly what you want
[/quote]

yes, but it was to answer the request (“Python” in the topic title)

[c.poupin]

@newshunhk

I have another problem, how can I keep list L3 and flatten the rest in python?

You want to delete the first 2 levels or flat the L3 level ?