databroker-browser does not show plots for keithly2450

[mrakitin]

I added databroker-browser code in 99-browser.py. When the data is displayed for keithly2450 detector/electrometer, the plot is not displayed & there are the following messages in the console:

In [1]: browse()
Out[1]: <databroker_browser.qt._core.BrowserWindow at 0x7fda04d63940>

In [2]: LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. wbs_hg
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. sample_x
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. sample_x
LivePlot did not get any data that corresponds to the y axis. keithly2450
LivePlot did not get any data that corresponds to the x axis. hfm_th
LivePlot did not get any data that corresponds to the y axis. keithly2450

@tacaswell, anything missing in hints?

[jrmlhermitte]

can you show what's in the descriptor? and perhaps try:

stream = db[uid].restream
next(stream)
next(stream)

and see the output of data_keys in the descriptor and data in the events?

I'm not the expert but it looks like it's not finding these keys.

[tacaswell]

that is because the key it should be looking for is keithly2450_reading. The data-broker-browser code seems to be assuming that the interesting field will have the same name as the device.

We should look into using BEC in the browser.

[mrakitin]

This hopefully should be fixed by bluesky/bluesky#967 and NSLS-II/databroker-browser#11, but will probably be available in the next cycle.

[awalter-bnl]

@mrakitin and I tested this and ran into an issue with databroker_browser

We are leaving this open until we resolve that error, but it is not a quick fix and may or may not be solved by the upcoming update to databroker browser.

[mrakitin]

We tried to run the browse() with the latest conda env collection-2019-2.0-smi, and it fails with the error:

In [17]: browse()                                                                                                                              
QObject::connect: Cannot connect QListWidget::currentItemChanged(QListWidgetItem*,QListWidgetItem*) to (null)::_on_results_selection_changed()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
~/.ipython/profile_collection/startup/users/30-user-Guillaume.py in <module>
----> 1 browse()

~/.ipython/profile_collection/startup/users/30-user-Guillaume.py in browse()
     28 
     29 def browse():
---> 30     return BrowserWindow(db, fig_dispatch, text_summary, search_result)
     31 

/opt/conda_envs/collection-2019-2.0-smi/lib/python3.6/site-packages/databroker_browser/qt/_core.py in __init__(self, db, fig_dispatch, text_dispatch, result_dispatch, max_results)
    424                  max_results=100):
    425         super().__init__(db, fig_dispatch, text_dispatch, result_dispatch,
--> 426                          max_results=max_results)
    427         self._window = QtWidgets.QMainWindow()
    428         self._window.setCentralWidget(self.widget)

/opt/conda_envs/collection-2019-2.0-smi/lib/python3.6/site-packages/databroker_browser/qt/_core.py in __init__(self, db, fig_dispatch, text_dispatch, result_dispatch, max_results)
    337         self._results = QtWidgets.QListWidget()
    338         self._results.currentItemChanged.connect(
--> 339             self._on_results_selection_changed)
    340         self._search_bar = QtWidgets.QLineEdit()
    341         self._search_bar.textChanged.connect(self._on_search_text_changed)

TypeError: connect() failed between currentItemChanged(QListWidgetItem*,QListWidgetItem*) and _on_results_selection_changed()

[danielballan]

Althought databroker-browser is no longer a going concern, some of the relevant code lives on in bluesky-widgets, and we should be sure to test that it works as expected before closing this.