TypeError: Cannot use summary() method of CalcoutRecord object

[prjemian]

Tried to demonstrate the .summary() method of an ophyd Device subclass today (apstools.devices.synApps.calcout.CalcoutRecord) and it failed with a TypeError as shown.

While the exception trace shows an error in ophyd, it seems likely that a fix could be applied here to prevent that exception in the first place.

[prjemian]

Same problem with SwaitRecord.

[prjemian]

Something is wrong with how these classes use hints and read_attrs.

[prjemian]

When these lines are commented out, no TypeError exception is raised:

apstools/apstools/synApps/calcout.py

Lines 129 to 130 in b846f5f

	read_attrs = APS_utils.itemizer("channels.%s", CHANNEL_LETTERS_LIST)
	hints = {"fields": read_attrs}

The other occurrences of hints and read_attrs does not affect this issue.

[prjemian]

It's an upstream problem in ophyd.device.Device:

~/.local/lib/python3.8/site-packages/ophyd/device.py in _summary(self)
   1080         read_attrs = self.read_attrs
   1081         config_attrs = self.configuration_attrs
-> 1082         used_attrs = set(read_attrs + config_attrs)
   1083         extra_attrs = [a for a in self.component_names
   1084                        if a not in used_attrs]

type(config_attrs) is ophyd.device.Device.OphydAttrList. If it was wrapped with list(config_attrs), then 1082 would succeed.

[prjemian]

FYI

(bluesky_2021_2) prjemian@zap:~/.../BCDA-APS/apstools$ conda list ophyd
# packages in environment at /home/prjemian/.conda/envs/bluesky_2021_2:
#
# Name                    Version                   Build  Channel
ophyd                     1.6.1              pyhd8ed1ab_0    conda-forge

[prjemian]

Since this is a problem with the .summary() method (which is not called typically within automation code, only by user's choice from a command line), resolution of the problem is not critical to the next release here.

No work to do here, so closing.