Why is this expression False?

Question

In Python,

1 in {1} == True

is False - why?

I first thought it's due to operator precedence, but all I can find (see below) tells me that the expression is evaluated from left to right:

• 1 in {1} is True
• True == True is True

Also, any other precedence would lead to a TypeError:

• {1} == True is False
• 1 in False returns a TypeError

---

Python evaluates expressions from left to right.

https://docs.python.org/3/reference/expressions.html#evaluation-order

Also,

Operators in the same box have the same precedence. [...] Operators in the same box group left to right ([...]).
[...]

https://docs.python.org/3/reference/expressions.html#operator-precedence