Python: an image to an array and an array to an image

Converting 8-bit gray-scale level images to numpy array, and generating a 8-bit gray-scale level image from array.

	import Image, numpy, scipy
	def image2array(im):
	newArr = numpy.fromstring(im.tostring(),numpy.uint8)
	newArr = numpy.reshape(newArr,im.size)
	return newArr
	def array2image(a):
	#a=a/a.max()*255.0 #optional.
	im=Image.Image()
	im=Image.fromarray(numpy.uint8(a))
	return im
	def example():
	Img=Image.open('some.tiff')
	arr=image2array(Img)
	#
	# some operations on array
	#
	Img2=array2image(arr)
	Img2.save('some2.png')

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