applies_alpha()

not a project, just a trick

how to applies alpha channel from a surface to another ?
surface1 and surface2 must have the same size

from pygame import *

def applies_alpha(surface1,surface2):
	#return a surface
	#applies the alpha channel from surface1 to surface2
	output = surface2.copy().convert_alpha()
	surfarray.pixels_alpha(output)[:] = surfarray.array_alpha(surface1)[:]
	return output

def applies_alpha_ip(surface1,surface2):
	#applies the alpha channel in place from surface1 to surface2
 	surfarray.pixels_alpha(surface2)[:] = surfarray.array_alpha(surface1)