gzip.py 文件源码

def write(self,data):
        self._check_closed()
        if self.mode != WRITE:
            import errno
            raise IOError(errno.EBADF, "write() on read-only GzipFile object")

        if self.fileobj is None:
            raise ValueError, "write() on closed GzipFile object"

        # Convert data type if called by io.BufferedWriter.
        if isinstance(data, memoryview):
            data = data.tobytes()

        if len(data) > 0:
            self.size = self.size + len(data)
            self.crc = zlib.crc32(data, self.crc) & 0xffffffffL
            self.fileobj.write( self.compress.compress(data) )
            self.offset += len(data)

        return len(data)