def test_find_last_for_smoke():
last, = mdsc.find_last()
def test_find_last_for_smoke():
last, = mdsc.find_last()
def __getitem__(self, key):
"""DWIM slicing
Some more docs go here
"""
if isinstance(key, slice):
# Interpret key as a slice into previous scans.
if key.start is not None and key.start > -1:
raise ValueError("slice.start must be negative. You gave me "
"key=%s The offending part is key.start=%s"
% (key, key.start))
if key.stop is not None and key.stop > 0:
raise ValueError("slice.stop must be <= 0. You gave me key=%s. "
"The offending part is key.stop = %s"
% (key, key.stop))
if key.stop is not None:
stop = -key.stop
else:
stop = None
if key.start is None:
raise ValueError("slice.start cannot be None because we do not "
"support slicing infinitely into the past; "
"the size of the result is non-deterministic "
"and could become too large.")
start = -key.start
result = list(find_last(start))[stop::key.step]
header = [Header.from_run_start(h) for h in result]
elif isinstance(key, int):
if key > -1:
# Interpret key as a scan_id.
gen = find_run_starts(scan_id=key)
try:
result = next(gen) # most recent match
except StopIteration:
raise ValueError("No such run found for key=%s which is "
"being interpreted as a scan id." % key)
header = Header.from_run_start(result)
else:
# Interpret key as the Nth last scan.
gen = find_last(-key)
for i in range(-key):
try:
result = next(gen)
except StopIteration:
raise IndexError(
"There are only {0} runs.".format(i))
header = Header.from_run_start(result)
elif isinstance(key, six.string_types):
results = None
if len(key) >= 36:
# Interpret key as a uid (or the few several characters of one).
logger.debug('Treating %s as a full uuid' % key)
results = list(find_run_starts(uid=key))
logger.debug('%s runs found for key=%s treated as a full uuid'
% (len(results), key))
if not results == 0:
# No dice? Try searching as if we have a partial uid.
logger.debug('Treating %s as a partial uuid' % key)
gen = find_run_starts(uid={'$regex': '{0}.*'.format(key)})
results = list(gen)
if not results:
# Still no dice? Bail out.
raise ValueError("No such run found for key=%s" % key)
if len(results) > 1:
raise ValueError("key=%s matches %s runs. Provide "
"more characters." % (key, len(results)))
result, = results
header = Header.from_run_start(result)
elif isinstance(key, Iterable):
# Interpret key as a list of several keys. If it is a string
# we will never get this far.
return [self.__getitem__(k) for k in key]
else:
raise ValueError("Must give an integer scan ID like [6], a slice "
"into past scans like [-5], [-5:], or [-5:-9:2], "
"a list like [1, 7, 13], a (partial) uid "
"like ['a23jslk'] or a full uid like "
"['f26efc1d-8263-46c8-a560-7bf73d2786e1'].")
return header
