Using regular Python objects in kernel code

aaditkamat

I wish to read float values from a file as I run the kernel code. The float conversion results in this error message:

repository/rtio.py:19:16-19:21: error: float cannot be invoked with the arguments (NoneType) if float(val) >= 1.0: ^^^^^ repository/rtio.py:19:16-19:21: note repository/rtio.py:19:16-19:21: error: float cannot be invoked with the arguments (NoneType) if float(val) >= 1.0: ^^^^^ repository/rtio.py:19:16-19:21: note 0 ^^^^^

The ARTIQ code:

class RTIO(EnvExperiment):
    def build(self):
        self.setattr_device("core") #Essential stuff
        self.ttl4 = self.get_device("ttl4") #finds TTL ch 4 on SINARA and naming it TTL4

    @kernel
    def run(self):
        while True:
            delay(100 * ms)
            file.readline()
            val = file.readline()
            if float(val) >= 1.0:
                self.ttl4.on()
            else:
                self.ttl4.off()
`

sb10q

Just convert it to float in the host. The device cannot handle file objects anyway.

def get_number(self) -> TFloat:
  return float(self.file.readline())
  
@kernel
def run(self):
  if self.get_number() >= 1.0:
 ...