PIL 图像字符画绘制

from PIL import Image

ascii_char = list('"$%_&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-/+@<>i!;:,\^`.')

def get_char(r,g,b,alpha = ):
    if alpha == :
        return ' '
    gray = int(0.2126*r+0.715*g+0.0722*b)
    unit = /len(ascii_char)
    return ascii_char[int(gray//unit)]

def main():
    file = input()
    im = Image.open(file)

    assert isinstance(im, Image.Image)

    W,H = ,
    im = im.resize((W,H))

    txt = ""
    fo = open("pic_char.txt","w")

    for i in range(H):
        txt=""
        for j in range(W):
            r,g,b = im.getpixel((j,i))
            txt += get_char(r,g,b)
        txt+='\n'
        fo.write(txt)
    fo.close()
main()

PIL第三方类库，无代码提示

assert isinstance(im, Image.Image)