is this a bug or not with if...else...?

[Larz60+]

looks like it violates PEP 20, but runs.
I don't see where the else is being interpreted as the 1st condition is satisfied.
reversed will give syntax error, because forced to run else code of first statement

a=None; b='abc'; a + ' & ' b if a != None else c = b

Output:
    a=None; b='abc'; a + ' & ' b if a != None else c = b
                               ^
SyntaxError: invalid syntax