def loadFromXML(self, filename):
"""Loads an xml file and parses the builder Experiment from it
"""
self._doc.parse(filename)
root = self._doc.getroot()
# some error checking on the version (and report that this isn't valid
# .psyexp)?
filenameBase = os.path.basename(filename)
if root.tag != "PsychoPy2experiment":
logging.error('%s is not a valid .psyexp file, "%s"' %
(filenameBase, root.tag))
# the current exp is already vaporized at this point, oops
return
self.psychopyVersion = root.get('version')
versionf = float(self.psychopyVersion.rsplit('.', 1)[0])
if versionf < 1.63:
msg = 'note: v%s was used to create %s ("%s")'
vals = (self.psychopyVersion, filenameBase, root.tag)
logging.warning(msg % vals)
# Parse document nodes
# first make sure we're empty
self.flow = Flow(exp=self) # every exp has exactly one flow
self.routines = {}
self.namespace = NameSpace(self) # start fresh
modifiedNames = []
duplicateNames = []
# fetch exp settings
settingsNode = root.find('Settings')
for child in settingsNode:
self._getXMLparam(params=self.settings.params,
paramNode=child,
componentNode=settingsNode)
# name should be saved as a settings parameter (only from 1.74.00)
if self.settings.params['expName'].val in ['', None, 'None']:
shortName = os.path.splitext(filenameBase)[0]
self.setExpName(shortName)
# fetch routines
routinesNode = root.find('Routines')
allCompons = getAllComponents(self.prefsBuilder['componentsFolders'],
fetchIcons=False)
# get each routine node from the list of routines
for routineNode in routinesNode:
routineGoodName = self.namespace.makeValid(routineNode.get('name'))
if routineGoodName != routineNode.get('name'):
modifiedNames.append(routineNode.get('name'))
self.namespace.user.append(routineGoodName)
routine = Routine(name=routineGoodName, exp=self)
# self._getXMLparam(params=routine.params, paramNode=routineNode)
self.routines[routineNode.get('name')] = routine
for componentNode in routineNode:
componentType = componentNode.tag
if componentType in allCompons:
# create an actual component of that type
component = allCompons[componentType](
name=componentNode.get('name'),
parentName=routineNode.get('name'),
exp=self)
else:
# create UnknownComponent instead
component = allCompons['UnknownComponent'](
name=componentNode.get('name'),
parentName=routineNode.get('name'),
exp=self)
# check for components that were absent in older versions of
# the builder and change the default behavior
# (currently only the new behavior of choices for RatingScale,
# HS, November 2012)
# HS's modification superceded Jan 2014, removing several
# RatingScale options
if componentType == 'RatingScaleComponent':
if (componentNode.get('choiceLabelsAboveLine')
or componentNode.get('lowAnchorText')
or componentNode.get('highAnchorText')):
pass
# if not componentNode.get('choiceLabelsAboveLine'):
# # this rating scale was created using older version
# component.params['choiceLabelsAboveLine'].val=True
# populate the component with its various params
for paramNode in componentNode:
self._getXMLparam(params=component.params,
paramNode=paramNode,
componentNode=componentNode)
compGoodName = self.namespace.makeValid(
componentNode.get('name'))
if compGoodName != componentNode.get('name'):
modifiedNames.append(componentNode.get('name'))
self.namespace.add(compGoodName)
component.params['name'].val = compGoodName
routine.append(component)
# for each component that uses a Static for updates, we need to set
# that
for thisRoutine in list(self.routines.values()):
for thisComp in thisRoutine:
for thisParamName in thisComp.params:
thisParam = thisComp.params[thisParamName]
if thisParamName == 'advancedParams':
continue # advanced isn't a normal param
elif thisParam.updates and "during:" in thisParam.updates:
# remove the part that says 'during'
updates = thisParam.updates.split(': ')[1]
routine, static = updates.split('.')
if routine not in self.routines:
msg = ("%s was set to update during %s Static "
"Component, but that component no longer "
"exists")
logging.warning(msg % (thisParamName, static))
else:
self.routines[routine].getComponentFromName(
static).addComponentUpdate(
thisRoutine.params['name'],
thisComp.params['name'], thisParamName)
# fetch flow settings
flowNode = root.find('Flow')
loops = {}
for elementNode in flowNode:
if elementNode.tag == "LoopInitiator":
loopType = elementNode.get('loopType')
loopName = self.namespace.makeValid(elementNode.get('name'))
if loopName != elementNode.get('name'):
modifiedNames.append(elementNode.get('name'))
self.namespace.add(loopName)
loop = eval('%s(exp=self,name="%s")' % (loopType, loopName))
loops[loopName] = loop
for paramNode in elementNode:
self._getXMLparam(paramNode=paramNode, params=loop.params)
# for conditions convert string rep to list of dicts
if paramNode.get('name') == 'conditions':
param = loop.params['conditions']
# e.g. param.val=[{'ori':0},{'ori':3}]
try:
param.val = eval('%s' % (param.val))
except SyntaxError:
# This can occur if Python2.7 conditions string
# contained long ints (e.g. 8L) and these can't be
# parsed by Py3. But allow the file to carry on
# loading and the conditions will still be loaded
# from the xlsx file
pass
# get condition names from within conditionsFile, if any:
try:
# psychophysicsstaircase demo has no such param
conditionsFile = loop.params['conditionsFile'].val
except Exception:
conditionsFile = None
if conditionsFile in ['None', '']:
conditionsFile = None
if conditionsFile:
try:
trialList, fieldNames = data.importConditions(
conditionsFile, returnFieldNames=True)
for fname in fieldNames:
if fname != self.namespace.makeValid(fname):
duplicateNames.append(fname)
else:
self.namespace.add(fname)
except Exception:
pass # couldn't load the conditions file for now
self.flow.append(LoopInitiator(loop=loops[loopName]))
elif elementNode.tag == "LoopTerminator":
self.flow.append(
LoopTerminator(loop=loops[elementNode.get('name')]))
elif elementNode.tag == "Routine":
if elementNode.get('name') in self.routines:
self.flow.append(self.routines[elementNode.get('name')])
else:
logging.error("A Routine called '{}' was on the Flow but "
"could not be found (failed rename?). You "
"may need to re-insert it".format(
elementNode.get('name')))
logging.flush()
if modifiedNames:
msg = 'duplicate variable name(s) changed in loadFromXML: %s\n'
logging.warning(msg % ', '.join(list(set(modifiedNames))))
if duplicateNames:
msg = 'duplicate variable names: %s'
logging.warning(msg % ', '.join(list(set(duplicateNames))))
# if we succeeded then save current filename to self
self.filename = filename
def addLoop(self, loop, startPos, endPos):
"""Adds initiator and terminator objects for the loop
into the Flow list"""
self.insert(int(endPos), LoopTerminator(loop))
self.insert(int(startPos), LoopInitiator(loop))
self.exp.requirePsychopyLibs(['data']) # needed for TrialHandlers etc