in this example% pnfuijoh will pass in this lambda function as the first parameterwhich computes the cube of and the parameter so what' this really doing under the hoodthis mbnceb function is function of itself that gets passed into the in % pnfuijoh in the previous exampleand here is going to be this will return of ywhich will end up executing our lambda function on the value so that goes into our parameterand our lambda function transforms that into times times which isof coursenow this comes up lot when we start doing mapreduce and spark and things like that so if we'll be dealing with hadoop sorts of technologies later onthis is very important concept to understand againi encourage you to take moment to let that sink in and understand what' going on there if you need to understanding boolean expressions boolean expression syntax is little bit weird or unusualat least in pythonqsjou the output of the above code is as follows'bmtf as usualwe have the double equal symbol that can test for equality between two values so does equal no it doesn'ttherefore 'bmtf the value 'bmtf is special value designated by remember that when you're trying to testwhen you're doing boolean stuffthe relevant keywords are svf with and 'bmtf with an that' little bit different from other languages that 've worked withso keep that in mind qsjou svfps'bmtf the output of the above code is as follows svf well svf or 'bmtf is svfbecause one of them is svfyou run it and it comes back svf ifjgtubufnfou qsjou jt