Good day. 

I am relatively new to odoo. 

This is my idea,

- if draft and pending, btn1 is invisible

-if draft or pending, btn_1 is invisible.

My worry is how to put "and" and "or" in attr.

This is my model

status = fields.Selection(selection=[('draft', 'Creating New Reservation'), ('pending', 'Pending'),('checkedin','Checked In'),('checkedout', 'Checked Out'),('paid', 'Paid'),('cancelled', 'Cancelled')], string="Status of Reservation")

and my form button 

 <button name='btn1_method' string='btn1'  type='object' 
 attrs=" {'invisible': [  ('status', '=', 'pending'),  ('status', '=', 'draft')]}" />

<button name='btn2_method' string='btn2'  type='object'
attrs=" {'invisible': [  ('status', '=', 'pending'), ('status', '=', 'draft')]}" />

 Please, how do i use make use of and and or in this situation. 

Thanks in advanced.