Callbacks

Receive documents from the bluesky RunEngine. File Writers are a specialized type of callback.

Callbacks

DocumentCollectorCallback	Bluesky callback to collect all documents from most-recent plan
document_contents_callback	prints document contents -- use for diagnosing a document stream
SignalStatsCallback	Callback: Collect peak (& other) statistics during a scan.

File Writing Callbacks

NXWriterAPS(*args, **kwargs)	Customize NXWriter with APS-specific content.
NXWriter(*args, **kwargs)	General class for writing HDF5/NeXus file (using only NeXus base classes).
SpecWriterCallback([filename, auto_write, ...])	Deprecated: Use SpecWriterCallback2.
SpecWriterCallback2(*args, **kwargs)	Write SPEC data file as data is collected, line-by-line.

Document Collector

DocumentCollectorCallback()	Bluesky callback to collect all documents from most-recent plan
document_contents_callback(key, doc)	prints document contents -- use for diagnosing a document stream

class apstools.callbacks.doc_collector.DocumentCollectorCallback

Bluesky callback to collect all documents from most-recent plan

Will reset when it receives a start document.

EXAMPLE:

from apstools.callbacks import DocumentCollectorCallback
doc_collector = DocumentCollectorCallback()
RE.subscribe(doc_collector.receiver)
...
RE(some_plan())
print(doc_collector.uids)
print(doc_collector.documents["stop"])

receiver(key, document)

keep all documents from recent plan in memory

apstools.callbacks.doc_collector.document_contents_callback(key, doc)

prints document contents – use for diagnosing a document stream

Collect statistics on the signals used in 1-D scans.

factor_fwhm	FWHM \(=2\sqrt{2\ln{2}}\cdot\sigma_c\)
SignalStatsCallback()	Callback: Collect peak (& other) statistics during a scan.

class apstools.callbacks.scan_signal_statistics.SignalStatsCallback

Callback: Collect peak (& other) statistics during a scan.

Caution

This is an early draft and is subject to change!

Subscribe the receiver() method. Use with step scan plans such as bp.scan() and bp.rel_scan().

Caution

It is recommended to subscribe this callback to specific plans. It should not be run with just any plan (it could easily raise exceptions).

Basic example

from bluesky import plans as bp
from bluesky import preprocessors as bpp

signal_stats = SignalStatsCallback()

def my_plan(detectors, mover, rel_start, rel_stop, points, md={}):

    @bpp.subs_decorator(signal_stats.receiver)  # collect the data
    def _inner():
        yield from bp.rel_scan(detectors, mover, rel_start, rel_end, points, md)

    yield from _inner()  # run the scan
    signal_stats.report()  # print the statistics

Public API

receiver(key, document)	Client method used to subscribe to the RunEngine.
report()	Print a table with the collected statistics for each signal.
data_stream	RunEngine document with signals to to watch.
stop_report	If True (default), call the report() method when a stop document is received.

Internal API

clear()	Clear the internal memory for the next run.
descriptor(doc)	Receives 'descriptor' documents from the RunEngine.
event(doc)	Receives 'event' documents from the RunEngine.
start(doc)	Receives 'start' documents from the RunEngine.
stop(doc)	Receives 'stop' documents from the RunEngine.
_scanning	Is a run in progress?
_registers	Dictionary (keyed on Signal name) of SummationRegister() objects.

_registers: dict = {}

Dictionary (keyed on Signal name) of SummationRegister() objects.

_scanning: bool = False

Is a run in progress?

clear()

Clear the internal memory for the next run.

data_stream: str = 'primary'

RunEngine document with signals to to watch.

descriptor(doc)

Receives ‘descriptor’ documents from the RunEngine.

event(doc)

Receives ‘event’ documents from the RunEngine.

receiver(key, document)

Client method used to subscribe to the RunEngine.

report()

Print a table with the collected statistics for each signal.

start(doc)

Receives ‘start’ documents from the RunEngine.

stop(doc)

Receives ‘stop’ documents from the RunEngine.

stop_report: bool = True

If True (default), call the report() method when a stop document is received.

apstools.callbacks.scan_signal_statistics.factor_fwhm = 2.3548200450309493

FWHM \(=2\sqrt{2\ln{2}}\cdot\sigma_c\)

see: https://statproofbook.github.io/P/norm-fwhm.html