python如何在终端里面显示一张图片

# coding:utf-8import sysreload(sys)sys.setdefaultencoding('utf8')#  __author__ = '郭 璞'#  __date__ = '2016/8/4'#  __Desc__ = 一个可以将图片转换成终端字符形式的小工具from time import *import Imageclass ImageTool():  def __init__(self):    print 'Initialization Completed! @',ctime()  def getChars(self,image_pixels,image_width,image_height):    replace_chars = 'ABCDEFGHIJKLMNO '    terminal_chars = ''    for h in xrange(image_height):      for w in xrange(image_width):        point_pixel = image_pixels[w,h]        terminal_chars +=replace_chars[int(sum(point_pixel)/3.0/256.0*16)]      terminal_chars+='/n'    return terminal_chars  def formatImage(self,imagename,image_width,image_height):    img = Image.open(imagename,'rb')    if img.mode != 'RGB':      img = img.convert('RGB')    w,h = img.size    rw = image_width*1.0/w    rh = image_height*1.0/h    r = rw if rw<rh else rh    rw = int(r*w)    rh = int(r*h)    img = img.resize((rw,rh),Image.ANTIALIAS)    return img  def entrance(self,image_path,out_width,out_height):    image = self.formatImage(imagename=image_path,image_width=out_width,image_height=out_height)    image_pixels = image.load()    out_width ,out_height = image.size    terminal_chars = self.getChars(image_pixels=image_pixels,image_width=out_width,image_height=out_height)if __name__ == "__main__":  tool = ImageTool()  imagename = sys.argv[1]  w = int(sys.argv[2])  h = int(sys.argv[3])  tool.entrance(imagename,w,h)