How do I find an element with a unique attribute

[chenqinggang001]

As shown in figure：

This property is unique in the element, and it's dynamic (with two states), and I can't locate it with xpath or CSS selecter，How do you locate this element by attribute name

[chenqinggang001]

I can't predict whether it's in a top or bottom state，So I want to locate it by attribute name

[mdmintz]

Selector by attribute: 'div[x-placement]'
Selector by attribute and value: 'div[x-placement="top-start"]'
Other selector by attribute and value: 'div[x-placement="bottom-start"]'

[chenqinggang001]

Maybe it's my syntax, I tried all these ways, but I couldn't locate this element

self.click("x-placement", by='Selector by attribute', timeout=10, delay=1)
self.click("div[x-placement]", by='Selector by attribute', timeout=10, delay=1)
self.click("x-placement", by='attribute', timeout=10, delay=1)
self.click("div[x-placement]", by='attribute', timeout=10, delay=1)

[mdmintz]

Use self.click("div[x-placement]")
(It's a CSS Selector, which is the default)

[chenqinggang001]

Thank you very much!