Python app engine: how to save a image?

Question

This is what I got from flex 4 file reference upload:

self.request =

    Request: POST /UPLOAD
    Accept: text/*
    Cache-Control: no-cache
    Connection: Keep-Alive
    Content-Length: 51386
    Content-Type: multipart/form-data; boundary=----------ei4cH2gL6ae0ei4ae0gL6GI3KM7ei4
    Host: localhost:8080
    User-Agent: Shockwave Flash

    ------------ei4cH2gL6ae0ei4ae0gL6GI3KM7ei4
    Content-Disposition: form-data; name="Filename"

    36823_117825034935819_100001249682611_118718_676534_n.jpg
    ------------ei4cH2gL6ae0ei4ae0gL6GI3KM7ei4
    Content-Disposition: form-data; name="Filedata"; filename="36823_117825034935819_100001249682611_118718_676534_n.jpg"
    Content-Type: application/octet-stream

    ���� [AND OTHER STRANGE CHARACTERS]

My class:

class Upload(webapp.RequestHandler):
    def post(self):
        content = self.request.get("Filedata")
        return "done!" 

Now what I'm missing in the Upload class in order to save that file to disk? i have in the content var some strange characters (viewing in debug).