__init__.py 文件源码

def write(self, data):
        """
        Write data to multiple clouds.

        Uses a write-through buffer to ensure each chunk is the proper size.
        Close flushes the remainder of the buffer.
        """
        if self._closed:
            raise IOError('I/O operation on closed file.')
        if self._size == 0:
            # First block. See if we can get a more specific mime type by
            # examining the data.
            mime = magic.from_buffer(data, mime=True)
            # Choose the better mimetype somehow, self.mime is determined by
            # the filename. mime is determined by magic.
            if not self.mime or mime != 'application/octet-strem':
                self.mime = mime
        self._size += len(data)
        self._md5.update(data)
        self._sha1.update(data)
        self._write_chunk(data)