def _size(self):
        b = self.f.tell()
        self.f.seek(0, 2)
        e = self.f.tell()
        self.f.seek(b, 0)
        return e - b
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/mail/imap4.py/FileProducer._size/original