True dynamic and anonymous functions possible in Python?

Question

Just as a dynamic class can be created using type(name, base-classes, namespace-dict), can a dynamic function be created?

I\'ve tried doing something along the line

Answer 1

A lot of people seem to be misled about the purpose of “lambda” in Python: its sole purpose is to define a simple single-expression function without a name. Nothing more. In Python, functions are indeed first-class objects, like they are in, say, LISP: you can pass them as arguments, store them in data structures, and return them as results. For example, here is a function that composes two given functions f and g, so compose(f, g)(x) is equivalent to f(g(x)):

def compose(f, g) :
    def result(x) :
        return f(g(x))
    #end result
    return result
#end compose

and here’s an example use:

>>> h = compose(lambda x : x + 2, lambda x : x * x)
>>> h(3)
11