fedora python pillow pil

pip install pillow 

python3.4安装pillow失败，将python改为python2.7，安装成功

rm -f /usr/bin/python

ln -s /usr/bin/python2.7 /usr/bin/python

安装成功，可能会需要其他的一些库，yum或者pip安装就好了

使用pillow图片库  2.7

#!/usr/bin/python2.7

from PIL import Image
import argparse

arg = argparse.ArgumentParser()
arg.add_argument("file")
arg.add_argument("-o","--output")
arg.add_argument("--width",type=int,default=80)
arg.add_argument("--height",type=int,default=80)

args = arg.parse_args()

img = args.file
width = args.width
height = args.height
output = args.output

ascii_char = list("$@B%8&WM#*abcdefghijklmnopqrstuvwxyz/|()1[]{}?+-_=<>:;.,'. ")

def get_char(r,b,g,alpha=256):
if alpha == 0:
return ' '
length = len(ascii_char)
gray = int(0.2126*r+0.7152*g+0.0722*b)
unit = (256.0+1)/length
return ascii_char[int(gray/unit)]

if __name__ == '__main__':
im = Image.open(img)
im = im.resize((width,height),Image.NEAREST)
txt = ""
for i in range(height):
for j in range(width):
txt += get_char(*im.getpixel((j,i)))
txt += '\n'

print txt

if output:
with open(output,"w") as f:
f.write(txt)
else :
with open("output.txt","w") as f:
f.write(txt)