def parseCluster(child):
try:
# retVal = {} # need to used OrderedDict
retVal = OrderedDict()
for node in child:
tag = node.tag
if tag == 'Name':
name = node.text
# retVal[name] = {}
retVal[name] = OrderedDict() #need to use OrderedDict
elif node.tag == 'NumElts':
pass
elif node.tag == 'String':
strList = parseString(node)
retVal[name][strList[0]] = strList[1]
elif node.tag == 'Path':
strList = parseString(node)
retVal[name][strList[0]] = strList[1]
elif node.tag == 'Array':
arrayList = parseArray(node)
retVal[name][arrayList[0]] = arrayList[1]
elif node.tag == 'Cluster': # Nested Clusters
for subName, subVal in parseCluster(node).iteritems():
retVal[name][subName] = subVal
else:
dataList = parseNumeric(node)
retVal[name][dataList[0]] = dataList[1]
return retVal
except Exception as e:
a = Lta_Error(e, sys.exc_info())
print a
raise e
def Lta_Unparse(topDict):
root = etree.Element("root")
root_doc = etree.SubElement(root, "doc")
try:
for tag in topDict:
uParse = __uParseType(type(topDict[tag]))
uParse(root_doc, topDict, tag)
except Exception as e:
a = Lta_Error(e, sys.exc_info())
print a
raise e
retVal = ''
for child in root_doc:
retVal = retVal + (etree.tostring(child, pretty_print=True))
# parser = etree.XMLParser(remove_blank_text=True)
# retVal = etree.tostring(etree.XML(retVal, parser=parser))
return retVal
def Lta_Parse(xml):
topDict = {}
try:
root = getRootDoc(xml)
# for each top level element, determine the data type and create
# a container in the op level dictionary
for child in root:
tag = child.tag
if tag == 'Cluster':
val = parseCluster(child)
topDict.update(val)
elif tag == 'Array':
val = parseArray(child)
val = {val[0]: val[1]}
else: # data that is not in a string or array
val = parseData(child)
topDict.update(val)
return topDict
except Exception as e:
err = Lta_Error(e, sys.exc_info())
raise err
# -*- coding: utf-8 -*-
from lta import Lta
import sys
from lta_err import Lta_Error
#------------------- following code must be in all scripts--------------------
lta = Lta("127.0.0.1", 60100) # all scripts must create an Lta object
try:
lta.connect() # connect to the Labview Host
#---------------------Script code goes here------------------------------------
EvtCfg = lta.__get__('bus1.event.config')
EvtCfg['clEvtConfig']['Fs'] = 60
lta.__set__('bus1.event.config', EvtCfg)
lta.__run__()
EvtCfg = lta.__get__('bus1.event.config')
EvtCfg['clEvtConfig']['Fs'] = 30
lta.__set__('bus1.event.config', EvtCfg)
lta.__run__()
EvtCfg = lta.__get__('bus1.event.config')
EvtCfg['clEvtConfig']['Fs'] = 20
lta.__set__('bus1.event.config', EvtCfg)
lta.__run__()
#------------------all scripts should send their errors to labview------------
except Exception as ex:
err = Lta_Error(ex, sys.exc_info()) #format a labview error
lta.send_error(err, 3, 'Abort') #send the error to labview for display
lta.close()
print err
CommsData = Lta_Parse(CommsData)
CommsData = Lta_Parse(CommsData['CommsData']['XMLData'])
return CommsData
except (IOError, Exception) as e:
raise e
def __run__(self):
try:
cmdDict = Lta_Command('run',"").cmdDict
xml = Lta_Unparse(cmdDict);
packet.SendPacket(self.s, xml)
CommsData = packet.ReceivePacket(self.s)
CommsData = Lta_Parse(CommsData); #print CommsData
assert CommsData['CommsData']['Command']=='LtaRunComplete', "Run was not acknowledged as completed"
except (IOError, Exception) as e:
raise e
if __name__=='__main__':
try:
execfile(sys.argv[1])
except Exception as ex:
lta = Lta("127.0.0.1",60100)
lta.connect()
err = Lta_Error(ex,sys.exc_info())
lta.send_error(err,3,'Abort')
lta.close()
else: # data that is not in a string or array
val = parseData(child)
topDict.update(val)
return topDict
except Exception as e:
err = Lta_Error(e, sys.exc_info())
raise err
if __name__ == '__main__':
# Test the parser
import os
fileRelPath = 'nested.xml' # has 2 nested clusters
# fileRelPath = 'err.xml' #LabVIEW formatted error messege
# fileRelPath = 'clData.xml' # Cluster Data
# fileRelPath = 'arData.xml' # Array Data
# fileRelPath = 'stData.xml' # Just Data
# fileRelPath = '..\..\..\Plugins\Plugin_B\Plugin.B.xml'
try:
thisDir = os.getcwd()
fileDir = os.path.join(thisDir, fileRelPath)
xml = open(fileDir).read()
dataStruct = Lta_Parse(xml)
print dataStruct
except Exception as e:
a = Lta_Error(e, sys.exc_info())
print a