deep into python lambda statement.

In python, lambda is actually a high-order function. for example, 

f = lambda x, y : x if x > y else y   

equals to:

def f(x, y):
	if x > y:
		return x
	else:
		return y

furtur more, consider we alreay hava a function named t with the following definiation:

def test(x, y):
	if x > y:
		return x
	else:
		return y

then, 

f = lambda: test

equals to:

def f():
	return test

so, we have the following results:

>>> f
<function <lambda> at 0x7f7faadc2e60>
>>> f()
<function test at 0x7f7faadc2b18>
>>> f()(2, 3)
3

Remember this, we can easily tell different formats lambda statements， for example,

args = {'x':2, 'y':3}

g = lambda: test()

h = lambda: test(**args)

i = (lambda:test)(**args)

j = (lambda:test)()(**args)

k = (lambda x,y: x if x>y else y)(**args)

You should alrady konw the values of g, h, i, j and k, right? if not, think for a second time that lambda is actually a high-order function.