python实现图片转字符小工具

from PIL import Image#灰度与字符的映射ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft//|()1{}[]?-_+~<>i!lI;:,/"^`'. ")WIDTH=int(input("请输入你想输出的宽度："))HEIGHT=int(input("请输入你想输出的高度："))INPUT=r'D:/Download/ascii_dora.png'OUTPUT=r'D:/Download/output.txt'def get_char(r,g,b,alpha=256):  if alpha==0:    return ' '  gray = 0.2126 * r + 0.7152 * g + 0.0722 * b  length=len(ascii_char)  unit=(256+1)/length  return ascii_char[int(gray/unit)]im=Image.open(INPUT)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'with open(OUTPUT,'w') as f:  f.write(txt)