Why doesn't lambda expression work?

Question

Python

My lambda expression doesn't work and throws a SyntaxError. Already tried a lot of things, does not help

class Example:
    def __init__(self):
        self.conn = sqlite3.connect("Example.sqlite3")
        self.cursor = self.conn.cursor()
        self._check_password = lambda word: raise ValueError("wrong password") if word != self.cursor.execute("Select password from members where login = ?", (user_login, )).fetchone()[0] 

start = Example()

Answer 1

First, if you assign a lambda to a variable, then you are using it for other purposes. Second, lambdas should not create side effects. Thirdly, operators cannot be used in lambdas.