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I have of late been learning Python, and am amazed by its superb runtime metaprogramming capabilities. Previously I came across the term 'runtime metaprogramming' was when I was reading about Smalltalk, which as far as I know boasts of best runtime metaprogramming capabilities. How well does Python stack up against Smalltalk w.r.t. metaprogramming? What are the notable differences between the approaches taken by two languages?