python使用Berkeley DB数据库实例-Python Tutorial-php.cn

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()

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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

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这里再总结一下操作步骤：

1.先初始化数据库

adb = db.DB()

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2.打开数据库

adb.open('db_filename',dbtype = db.DB_HASH, flags = db.DB_CREATE)

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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

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4.关闭数据库

adb.close()

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希望本文所述对大家的Python程序设计有所帮助。

Related labels：

Berkeley db python database

source：php.cn

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