rarfile.py 文件源码

def read(self, cnt = None):
        """Read all or specified amount of data from archive entry."""

        # sanitize cnt
        if cnt is None or cnt < 0:
            cnt = self.remain
        elif cnt > self.remain:
            cnt = self.remain
        if cnt == 0:
            return EMPTY

        # actual read
        data = self._read(cnt)
        if data:
            self.CRC = crc32(data, self.CRC)
            self.remain -= len(data)
        if len(data) != cnt:
            raise BadRarFile("Failed the read enough data")

        # done?
        if not data or self.remain == 0:
            #self.close()
            self._check()
        return data