打开BDB中某个索引中的数据库代码：
from bsddb3 import db import bsddb3 as bsddb print db.DB_VERSION_STRING mydb = db.DB() mydb.open('your_btree_db_filename', 'databsename', dbtype=db.DB_BTREE) rec = cur.first() while rec: #print key value print int(rec[0].encode('hex'), 16), "=>", len(rec[1]) rec = cur.next() mydb.close()
注意：同一个db file中可能有多个database！
这样就和 /usr/local/BerkeleyDB.6.1/bin/db_dump your_btree_db_filename 结果一样了，dump结果如下所示：
VERSION=3 format=bytevalue database=BLOCK_TIME_RANGE type=btree duplicates=1 db_pagesize=4096 HEADER=END DATA=END VERSION=3 format=bytevalue database=xxxxyour databse name type=btree duplicates=1 db_pagesize=4096 HEADER=END 01000000 #=>key 5e096909f0fxxxxx # value 01000001 #=>key 5e096809f0ffff83xxxxxxx # value
xxxxxxxxxxxx more btree data xxxxxxxxxxxx
顺便补充，查看一个db中有多少数据库：
bdb = bsddb.btopen('32_20170228151803_qsb.idx', 'r') print bdb.keys() bdb.close()
再补充，打开reco DB示例：
from bsddb3 import db import bsddb3 as bsddb print db.DB_VERSION_STRING mydb = db.DB() mydb.open('30_20170228145149_qsb.db',dbtype=db.DB_RECNO) cur = mydb.cursor() i = 0 f = open("data.bin", "wb") rec = cur.first() while rec: #print rec print rec[0], type(rec[1]) f.write(rec[1]) # write data to file rec = cur.next() i += 1 f.close() mydb.close()
本文转自张昺华-sky博客园博客，原文链接：http://www.cnblogs.com/bonelee/p/6510543.html，如需转载请自行联系原作者
