SikuliX test report name with Timestamp

How to save SikuliX Test Report file as "Filename+TimeStamp" using HtmlTestRunner. I want filename of report with name and timestamp. Which code shall I write in SikuliX script?

I have written following code but not working:
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#Gets the timestamp as an argument to the sikuli via batch and suffixes to the test report

datearg = ""
parms = sys.argv [1:]
print parms
for i in range (len(parms)):
       datearg = parms[i]
fp = file(os.path.join(dir, "testReport_"+datearg+".html"), "wb") #output HTML file
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