Permutations with generators

[Bjoern Schliessmann]

Pablo Torres wrote:

> AttributeError: 'NoneType' object has no attribute 'insert'
> 
> Could somebody please explain to me why my p variable has no type
> at all?

It does have a type, NoneType. As already explained, only None
normally is of type NoneType.

Regards,


Björn

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