Python change data to bytes without saving to disk

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Python change data to bytes without saving to disk
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import io
from PIL import Image

im = Image.open('test.jpg')
im_resize = im.resize((500, 500))
buf = io.BytesIO()
im_resize.save(buf, format='JPEG')
byte_im = buf.getvalue()

JSON data to binary type

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# change json to binary string
data = json.dumps(route_coords).encode("ascii")