According to the official documentation, the ternary operator has left-to-right associativity :
------------------- Operators in the same box group left to right (except for comparisons, including tests, which all have the same precedence and chain from left to right -- see section Comparisons -- and exponentiation, which groups from right to left). ------------------- Nevertheless, the ternary operator grouping seems to be from right to left, compare : >>> p = 0 if 1 else 0 if 0 else 1 >>> p 0 >>> left_to_right = (0 if 1 else 0) if 0 else 1 >>> right_to_left = 0 if 1 else (0 if 0 else 1) >>> p == left_to_right False >>> p == right_to_left True >>> -- https://mail.python.org/mailman/listinfo/python-list
