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Amazon Product API now requires a signature with every request which I'm trying to generate ushing Python. The step I get hung up on is this one: "Calculate an RFC 2104-compliant HMAC with the SHA256 hash algorithm using the string above with our "dummy" Secret Access Key: 1234567890. For more information about this step, see documentation and code samples for your programming language." Given a string and a secret key (in this case 1234567890) how do I calculate this hash using Python? ----------- UPDATE ------------- The first solution using HMAC.new looks correct however I'm getting a different result than they are. http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/index.html?rest-signature.html According to Amazon's example when you hash the secret key 1234567890 and the following string GET webservices.amazon.com /onca/xml AWSAccessKeyId=00000000000000000000&ItemId=0679722769&Operation=I temLookup&ResponseGroup=ItemAttributes%2COffers%2CImages%2CReview s&Service=AWSECommerceService&Timestamp=2009-01-01T12%3A00%3A00Z& Version=2009-01-06 You should get the following signature: 'Nace+U3Az4OhN7tISqgs1vdLBHBEijWcBeCqL5xN9xg=' I am getting this: '411a59403c9f58b4a434c9c6a14ef6e363acc1d1bb2c6faf9adc30e20898c83b'

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