gistfile1.py

import zipfile
zile = system.file.saveFile("temp.zip")
myzip = zipfile.ZipFile(zile,'w')

invoiceId = event.source.parent.getComponent('Container').getComponent('tblInvoices').selectedInvoice
invoiceFile = system.file.getTempFile("pdf")
bytes = event.source.parent.getComponent('Report Viewer Labour').getBytesPDF()
system.file.writeFile(invoiceFile,bytes)

invoiceName = "000000" + str(invoiceId)
invoiceName = invoiceName[-6:]
invoiceName = "Invoice " + invoiceName + ".pdf"

myzip.write(invoiceFile,invoiceName)

receipts = system.db.runPrepQuery("SELECT `receipt_file_name`,`receipt_blob` FROM `expenses` WHERE invoice_id = ?",[invoiceId])
i = 1
for row in receipts:
	tFile = system.file.getTempFile(".tmp")
	system.file.writeFile(tFile,row[1])
	myzip.write(tFile,row[0])
myzip.close()