fix: allow empty returns from tsp_device.get_buffers()

CHANGELOG.md

@@ -57,6 +57,7 @@ However, please read through all changes to be aware of what may potentially imp
     - A configuration function provides the ability to set different logging levels for stdout and file logging.
     - The config file and environment variable can also be used to control the logging functionality.
     - The debug logging from the `pyvisa` package is also included in the log file by default.
+- Updated `get_buffers()` in `TSPControl` to not error out if query returns with empty string.
 
 ### Removed
 
@@ -97,6 +98,7 @@ However, please read through all changes to be aware of what may potentially imp
 
 - `collectgarbage()` is now called during cleanup of `TSPControl` children.
 - Added USBTMC Support for the AFG31K and MDO3 drivers.
+-
 
 ---
 

src/tm_devices/driver_mixins/device_control/tsp_control.py

@@ -116,7 +116,9 @@ def get_buffers(self, *args: str) -> Dict[str, List[float]]:
                 if buffer_name.endswith(attr_name):
                     buffer_size_name = buffer_name.rstrip(attr_name)
                     break
-            buffer_str = self.query(f"printbuffer(1, {buffer_size_name}.n, {buffer_name})")
+            buffer_str = self.query(
+                f"printbuffer(1, {buffer_size_name}.n, {buffer_name})", allow_empty=True
+            )
             buffer_data[buffer_name] = [float(x) for x in buffer_str.split(", ") if buffer_str]
         return buffer_data