would calling spidev.SpiDev() function repeatedly cause memory leak

[jamcinnes2]

This python library https://github.com/chandrawi/LoRaRF-Python uses spidev. I'm getting a memory leak using this LoRaRF library on an rpi Zero 2. Tracemalloc shows that the culprit is this function in the LoRaRF library. I suspect calling the spidev constructor over and over for every transfer is the problem. Do you think?

def transfer(self, buf: Iterable) -> tuple:
        spi = spidev.SpiDev()
        spi.open(self.bus, self.cs)
        spi.lsbfirst = False
        spi.mode = 0
        spi.max_speed_hz = self.speed
        ret = spi.xfer2(buf)
        spi.close()
        return ret