[BUG]: ComputedSignal bugs from X10SA testing

[d-perl]

Provide a brief description of the bug.

Several issues appeared during attempted implementation of a ComputedSignal combining some BPMs

• Function parsing is extremely fragile. e.g., including more than one space between def and the function name will break it with an extremely difficult to interpret error

Device bcu_xasym failed to update:
 Traceback (most recent call last):
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 152, in _load_session
    self.initialize_delayed_devices(dev, config, obj)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 175, in initialize_delayed_devices
    obj = self.initialize_device(dev, config, obj)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 355, in initialize_device
    self.update_config(obj, config)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 264, in update_config
    setattr(obj, config_key, config_value)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/ophyd_devices/ophyd_devices/utils/dynamic_pseudo.py", line 106, in compute_method
    exec(method, out)
  File "<string>", line 1
    user_compute_methodduser_compute_methodeuser_compute_methodfuser_compute_method user_compute_method user_compute_methodcuser_compute_methodouser_compute_methodmuser_compute_methodpuser_compute_methoduuser_compute_methodtuser_compute_methodeuser_compute_method_user_compute_methodxuser_compute_methodauser_compute_methodsuser_compute_methodyuser_compute_methodmuser_compute_method(user_compute_method)user_compute_method:user_compute_method

• Signal names for computed signals cannot contain underscores as they will be interpreted as signals of devices - we should implement fix: init devices with - separator bec#565 for this

A recovery config was written to /home/gac-x10sa/data/raw/logs/device_configs/recovery_configs/recovery_config_2025-10-22_10-17-31.yaml.
Failed to update the config for some devices.
Device bcu_xasym failed to update:
 Traceback (most recent call last):
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 152, in _load_session
    self.initialize_delayed_devices(dev, config, obj)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 175, in initialize_delayed_devices
    obj = self.initialize_device(dev, config, obj)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 355, in initialize_device
    self.update_config(obj, config)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/devices/devicemanager.py", line 264, in update_config
    setattr(obj, config_key, config_value)
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/ophyd_devices/ophyd_devices/utils/dynamic_pseudo.py", line 134, in input_signals
    obj = rgetattr(self._device_manager.devices, target)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/ophyd_devices/ophyd_devices/utils/dynamic_pseudo.py", line 21, in rgetattr
    return reduce(_getattr, [obj] + attr.split("."))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/ophyd_devices/ophyd_devices/utils/dynamic_pseudo.py", line 19, in _getattr
    return getattr(obj, attr, *args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_lib/bec_lib/devicemanager.py", line 88, in __getattr__
    raise DeviceConfigError(f"Device {attr} does not exist.")
bec_lib.bec_errors.DeviceConfigError: Device bcu does not exist.
.

• Docstring claims numpy is imported as np but it was not available to the function

RPCError: During an RPC, the following error occured:
NameError: ["name 'np' is not defined"].
Traceback: Traceback (most recent call last):
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/rpc_mixin.py", line 37, in run_rpc
    res = self.process_rpc_instruction(instr)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/rpc_mixin.py", line 216, in process_rpc_instruction
    return self._handle_misc_rpc(instr)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/rpc_mixin.py", line 147, in _handle_misc_rpc
    res = self._get_result_from_rpc(rpc_var, instr_params)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/bec/bec_server/bec_server/device_server/rpc_mixin.py", line 56, in _get_result_from_rpc
    res = rpc_var()
          ^^^^^^^^^
  File "/data/test/x10sa-test-bec/production_deployments/20250828T103127/ophyd_devices/ophyd_devices/utils/dynamic_pseudo.py", line 146, in get
    return self._compute_method(*self.input_signals)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 2, in user_compute_method
NameError: name 'np' is not defined

 The request will be aborted.

Describe what you expected to happen and what actually happened.

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Outline the steps that lead to the bug's occurrence. Be specific and provide a clear sequence of actions.

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bec_widgets version

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bec core version

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Any extra info / data? e.g. log output...

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Related issues

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