Thank you all, especially Ray Carnes !

Please review https://www.odoo.com/forum/help-1/domain-notation-using-multiple-and-nested-and-2170 for more background and a methodology to generate expressions.

By default '&' is applied. this code should work if what you want is all these conditions to be true at the same time. But if you want either of this condition to be true, then use '|' instead. Then the syntax would be ['|','|',A,B,C].

I have noticed that in your sample code your are putting field in '' . Don't do that, write field name without '' , the same as you did for False.

So your code would be

attrs="{'invisible': [('firstField '!=', somevalueForFirstField),
                      ('secondField', '!=', someValueForSecondField),
                      ('thirdField','=',False)]}"

Hello,

'|' and '&' can be a little tricky.

Assuming you are on Odoo14, the correct way with 2 elements in your code would be:

attrs="{'invisible': ['&', 
                      ('firstField '!=', 'somevalueForFirstField'),
                      ('secondField', '!=', 'someValueForSecondField')
                      ]}"

So i haven't tryed but maybe the third one needs another '&' in between the second and third element or the first and the second?