You can use the
BytesIO class to get a wrapper around strings that behaves like a file. The
BytesIO object provides the same interface as a file, but saves the contents just in memory:
import io with io.BytesIO() as output: image.save(output, format="GIF") contents = output.getvalue()
You have to explicitly specify the output format with the
format parameter, otherwise PIL will raise an error when trying to automatically detect it.
If you loaded the image from a file it has a
format parameter that contains the original file format, so in this case you can use
In old Python 2 versions before introduction of the
io module you would have used the
StringIO module instead.