python - Getting an invalid syntax error -

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apologies in advance know simple problem. i'm total beginner python, have decided use write mapreduce doing sentiment analysis.

i have taken python file link: http://www.alex-hanna.com/tworkshops/lesson-6-basic-sentiment-analysis/ give me guidance , trying run it. code particular thing have problems is:

… if len(sys.argv) < 2:    print "usage: avgnreduce.py "    sys.exit(0) …

the error is: 

   if len(sys.argv) < 2:                        ^    syntaxerror: invalid syntax

i'm assuming basic problem resolve, despite googling don't know how i'm meant fix this. i've tried using colon instead of semi colon , have ensured ampersand correct copying over. ideas?

you're looking < operator there instead of lt. (lt stands less operator in html, see this thread.)

if len(sys.argv) < 2:     print "usage: avgnreduce.py "     sys.exit(0)

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