How to pass list for bound of control pulse for cpo.optimize_pulse function

[Shilan Savan]

Hi, I have a question regarding optimize pulse function in qutip.

According to documentation of the function" the amp_lbound and amp_ubound parameters 

could be

 scalar value applied to all controls

or a list of bounds for each control"

However, when I try to pass a list like [-0.5, -1], I get an error saying it's not accepted.

Can someone please clarify how to correctly pass a list of bounds for each control?

Thanks in advance