Python filter type problem

[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…