파이썬 람다 폼 - python lambda form/function

솔찍히 이해를 못한 부분인데, 간단한 함수를 만드는 것 같다.
함수 포인터 같기도 한데 LISP에서 따왔다고도 하는데 먼소리인지 안드로메다로.

Python supports the creation of anonymous functions (i.e. functions that are not bound to a name) at runtime, using a construct called "lambda". >>> def f (x): return x**2 ...  >>> print f(8) 64 >>>  >>> g = lambda x: x**2 >>>  >>> print g(8) 64 As you can see, f() and g() do exactly the same and can be used in the same ways. Note that the lambda definition does not include a "return" statement -- it always contains an expression which is returned. Also note that you can put a lambda definition anywhere a function is expected, and you don't have to assign it to a variable at all.  [링크 : http://www.secnetix.de/olli/Python/lambda_functions.hawk]

4.7.5. Lambda Forms¶ By popular demand, a few features commonly found in functional programming languages like Lisp have been added to Python. With the lambda keyword, small anonymous functions can be created. Here’s a function that returns the sum of its two arguments: lambda a, b: a+b. Lambda forms can be used wherever function objects are required. They are syntactically restricted to a single expression. Semantically, they are just syntactic sugar for a normal function definition. Like nested function definitions, lambda forms can reference variables from the containing scope: >>> def make_incrementor(n): ... return lambda x: x + n ... >>> f = make_incrementor(42) >>> f(0) 42 >>> f(1) 43 [링크 : http://docs.python.org/tutorial/controlflow.html]

아무튼,

>>> f <function <lambda> at 0xb754da3c>

위의 예제 실행후 f만 입력하면 위와 같이 fuction <lambda> 라는 말이 나온다.
일종의 간단한 return이 필요없는 함수 - c에서 inline 함수? - 가 되는 것처럼 보인다.