bson issue

bson_issue.py

klauer@xf03id-srv1:~/dev/pyepics$ cat bug.py
from ophyd import (SimDetector, TIFFPlugin, HDF5Plugin)
from ophyd.device import (Component as Cpt, )
prefix = 'XF:31IDA-BI{Cam:Tbl}'

class MyDetector(SimDetector):
   tiff1 = Cpt(TIFFPlugin, 'TIFF1:')


det = MyDetector(prefix)
det.wait_for_connection()

print(det.describe())
print(det.tiff1.capture.describe())

print(det.tiff1.dim0_sa.get(use_monitor=True))
print(det.tiff1.dim0_sa.get(use_monitor=False))


import bson
import numpy as np
from metadatastore.commands import _transform_data
import collections

timestamps = collections.defaultdict(lambda key=None: 0.0)

ddet = _transform_data(det.read(), timestamps)
dtiff = _transform_data(det.tiff1.read(), timestamps)

bson.BSON.encode(ddet)
bson.BSON.encode(dtiff)

Traceback (most recent call last):
  File "../bug.py", line 33, in <module>
    bson.BSON.encode(ddet)
  File "/home/klauer/ramdisk/mc/envs/ophyd0/lib/python3.5/site-packages/bson/__init__.py", line 935, in encode
    return cls(_dict_to_bson(document, check_keys, codec_options))
bson.errors.InvalidDocument: Cannot encode object: array([0])