You want to use a script to find the Shift that have been configured for an Equipment ?

Use this function/code
eqPath = system.mes.loadMESObjectByEquipmentPath('[global]\<Enterprise>\<Site>\<Area>\<Line>')
eqPath.getIgnitionSchedule()

if you wanted for example to find the Shift Available for a given Date/Time Window for a given Equipment, another option would be:
begin = system.date.now()
anotherBegin = system.date.addDays(begin, 4)
end = system.date.addDays(begin, 5)
print begin
print anotherBegin
print end
analysis = system.mes.analysis.createMESAnalysisSettings('analysis')
analysis.setDataPoints("Line Schedule Available,Scheduled Shift")
analysis.setFilterExpression("Equipment Path = 'Nuts Unlimited\SiteOne\Cust\Generic'")
analysis.setGroupBy("Scheduled Shift")
analysis.setSettingValues("Include Future=True")
# system.mes.analysis.executeAnalysis() returns an MES Analysis Results object
# For documentation, see: https://help.sepasoft.com/docs/display/MHD/MES+Analysis+Results
results = system.mes.analysis.executeAnalysis(anotherBegin, end, analysis)
if results.hasMessage():
count = results.getMessageCount()
message_list = [str(results.getMessage(index)) for index in range(count)]
# getDataset() returns an Ignition Dataset
# For documentation, see: https://docs.inductiveautomation.com/display/DOC79/Datasets
dataset = results.getDataset()
sep = ",\t"
print sep.join(dataset.getColumnNames())
for row in range(dataset.getRowCount()):
print sep.join(map(str, dataset.getRow(row)))

you can verify the logic of the script by building the (almost) same Impromptu Analysis that would show if you indeed would
return a Shift for that date
(important to add the correct Settings: Include Future = True !!)

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