It's hard to come up with a short answer to explain the greatness of the tightly integrated system with tons of functionality and highly sophisticated function/rule based programming style, but let me give you a quick taste of it: the following code

    CloudDeploy[
      FormFunction[{"a" -> "Number", "b" -> "Number", "c" ->    "Number"}, 
      Plot[#a x^2 + #b x + #c, {x, -10, 10}] &],
        Permissions -> "Public"]

will create and deploy a publicly accessible web form that asks for 3 coefficients and plots a parabola. How many lines of code / external libraries would you need to do the same thing in python?

https://www.wolframcloud.com/obj/e0b275e6-49a2-4901-a806-e36...