python - How do I pull out the first 3 lines of each ppm file? -

all have done opened small file , appended contents list called files. files contains list of tiny ppm lines.

how remove first 3 lines of file existence?

here's example of .ppm file looks like, it's called, tiny.ppm.

p3 5 5 255 255 0 0 100 150 175 100 150 175 100 150 175 100 150 175 100 150 175 255 0 0 100 150 175 100 150 175 100 150 175 100 150 175 100 150 175 255 0 0 100 150 175 100 150 175 100 150 175 100 150 175 100 150 175 255 0 0 100 150 175 100 150 175 100 150 175 100 150 175 100 150 175 255 0 0 

my code below, however, want 'files' contain list of 9 lists containing 9 different files' information, , remove first 3 lines of of too.

def readfiles():     files = []     files.append(open('tiny.ppm','ru').readlines())     print(files) 

if want more robust reading images , performing various operations on them, recommend pillow package in python.

from pil import image glob import glob  def readfiles():     images = []     f in glob("*.ppm"):         image = image.open(f)         image_pix = list(image.getdata())  # retrieve raw pixel values list         images.append(image_pix)     return images  # images list of lists of pixel values 

for example, can crop image:

box = (100, 100, 400, 400) region = image.crop(box) 

more examples , tutorial here: http://pillow.readthedocs.org/en/latest/handbook/tutorial.html