cryptographically_secure_generators.py 文件源码

def seed(self, a=None, version=2):
        """Initialize the internal state of the generator."""
        if not (1 <= a <= self.n - 1):
            raise ValueError("Seed value must be between 1 and n-1=" + str(self.n - 1))
        if gcd(a, self.n) != 1:
            raise ValueError("Seed value must be co-prime to n=" + str(self.n))

        super().seed(a, version)
        self.x = pow(a, 2, self.n)