imgcombine.py

#append imgs
# thx for the thread! https://stackoverflow.com/questions/30227466/combine-several-images-horizontally-with-python
from PIL import Image,ImageDraw

images = [Image.open(x) for x in [str(i)+'.png' for i in range(1,901)]]
widths, heights = zip(*(i.size for i in images))

new_im = Image.new('RGB', (12*30, 12*30))

x_offset = 0
y_offset = 0
for i,im in enumerate(images):
	i+=1
	new_im.paste(im, (x_offset,y_offset))
	if i%30==0:
		x_offset += im.size[0]
		y_offset += im.size[1]
		x_offset=0
	else:
		x_offset += im.size[0]

new_im.save('test.jpg')