Python Lambda Forms

Simple Lambda Forms
def evaluate(f): print f(2) f = lambda x: x**2 print evaluate(f)     <- prints 4

def evaluate2(f): print f(2,3) f = lambda a,b: a+b print evalute2(f)     <- prints 5

This example is adopted from one of the Python ASCII Art pages:
def use(f): print f(x,l)

shade    = lambda col,x,y: col - float(w-x) / w righthalf = lambda colf,x,y: (x>(w/2)) * col wave   = lambda col,x,y: col + sin( y * .2 ) / 10 + .5 int2   = lambda col,x,y: col + (x * y) % 40 / 40. - .2 stripe = lambda col,x,y: col + (x + y) % 10 / 10. - .2 circles = lambda col,x,y: col + (((x-2*w/3)**2 + (y*1.8-43)**2)**.5) % 8 < 4 int1   = lambda col,x,y: col + ( sin( x / 8.) + 2 + sin( y * x / 2.)) ** ( sin( y / 7. ) + 1 ) / 16. blob   = lambda col,x,y: col + ( sin( x * .5 + sin(  x * .23 + y * .21 ))                       + sin( y * .5 + sin( -x * .23 + y * .21 ))) / 2. + .2

combination = lambda x,y : shade(circles(0,x,y)/4.+blob(0,x,y)*0.5+0.3,x,y) use(combination)

This doesn't seem very clever. Any comments on this are very welcome.