Conditional expression/Ternary Operator help please

Question

a = 7
b = 1 if a >= 5 else 42
print(b)

a = 4
print(b)

OUTPUT:
>>>
1
1
>>>

WHY is the 2nd line of OUTPUT equal to 1 instead of 42? Thanks

Answer 1

You have to repeat the check:
b was checked only once, right after a was assigned 7. There is no check after a was changed, and b stayed the same.

Answer 2

because you have to reassign b value once more after reassigning a.
b was calculated before and stays the same until you assign something new to it.
apply the same ternary operator after reassigning a and before printing b

Answer 3

I think we are just printing b with out considering ternary operator in the second line
I think if we use b=1 if a>=5 else 42 after a=4 it would print 7