Return perlin noise seede with the specified key.
        For parameters, check the PerlinNoise class.

def perlin(self, key, **kwargs):
        """Return perlin noise seede with the specified key.
        For parameters, check the PerlinNoise class."""

        if hasattr(key, "encode"):
            key = key.encode('ascii')

        value = zlib.adler32(key, self.seed)
        return PerlinNoise(value, **kwargs)