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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _body(self):
 """ The HTTP request body as a seekable file-like object. This property returns a copy of the `wsgi.input` stream and should be used instead of `environ['wsgi.input']`. """

        maxread = max(0, self.content_length)
        stream = self.environ['wsgi.input']
        body = BytesIO() if maxread < MEMFILE_MAX else TemporaryFile(mode='w+b')
        while maxread > 0:
            part = stream.read(min(maxread, MEMFILE_MAX))
            if not part: break
            body.write(part)
            maxread -= len(part)
        self.environ['wsgi.input'] = body
        body.seek(0)
        return body