How does permute work in QuTip?

[Pontus Wikståhl]

How does permute work in QuTip?

I haven't found a single example of it online. In the tutorial it is defined as the following

 

Q.permute(order) Permutes the tensor structure of a composite object in the given order.

What should (order) be? Is it a number? Is it a list?

I think I kinda got a hang of it.

Suppose that I want to permute the following tensor

z = tensor(sigmaz(),qeye(2))

Then if I write 

z.permute([1])

it basically gives me

z = tensor(qeye(2),sigmaz())

But say that I want to generalize this to a tensor of the following form 

z = tensor(sigmaz(),qeye(2),qeye(2))

Then if I write 

z.permute([1])

what I thought would give me

z = tensor(qeye(2),sigmaz(),qeye(2))

But instead Python only craches everytime.

So apparently I don't understand how the permute function works in QuTip.