[Tutor] flattening a list

[Chad Crabtree]

The only problem with this if it is to big or to deeply nested then
it 
will overflow the stack?

Mario Rol wrote:

> nice and concise, found on comp.lang.python:
>
> def flatten(a):
>    if not isinstance(a,(tuple,list)): return [a]
>    if len(a)==0: return []
>    return flatten(a[0])+flatten(a[1:])
>
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