python使用Berkeley DB数据库实例
本文实例讲述了python使用Berkeley DB数据库的方法，分享给大家供大家参考。
具体实现方法如下：
try:
from bsddb import db
except ImportError:
from bsddb3 import db
print db.DB_VERSION_STRING
#检测是否有bsddb包
def irecords(curs):
record = curs.first()
while record:
yield record
record = curs.next()
adb = db.DB()
adb.open('db_filename',dbtype = db.DB_HASH, flags = db.DB_CREATE)
for i,w in enumerate('some word for example'.split()):
adb.put(w,str(i))
for key, data in irecords(adb.cursor()):
print key,data
adb.close()
print '*'*60
#
the_same_db = db.DB()
the_same_db.open("db_filename")
the_same_db.put('skidoo','23')#加入数据库
the_same_db.put('for','change the data')#改变数据库的数据
for key, data in irecords(the_same_db.cursor()):
print key,data
the_same_db.close()
运行结果如下：
Berkeley DB 4.7.25: (May 15, 2008) example 3 some 0 word 1 for 2 ************************************************************ example 3 some 0 word 1 for change the data skidoo 23
这里再总结一下操作步骤：
1.先初始化数据库
adb = db.DB()
2.打开数据库
adb.open('db_filename',dbtype = db.DB_HASH, flags = db.DB_CREATE)
3.插入或修改数据库中的数据
adb.put('skidoo','23')#加入数据库
adb.put('for','change the data')#改变数据库的数据
4.关闭数据库
adb.close()
希望本文所述对大家的Python程序设计有所帮助。
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