Python uses a Berkeley DB database instance

This article describes how Python uses the Berkeley DB database and shares it for everyone's reference.

The implementation method is as follows:

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 ', ' at ') #加入数据库 the_same_db.put (' for ', ' Change the data ') # Change database data for key, Irecords (The_same_db.cursor ()):   print Key,data the_same_db.close ()

The results of the operation are as follows:

Berkeley DB 4.7.25: (May) example 3some 0word 1for 2*********************************************************** *example 3some 0word 1for Change the Dataskidoo 23

Here is a summary of the operation steps:

1. Initialize the database First

ADB = db. DB ()

2. Open the Database

Adb.open (' db_filename ', DbType = db. Db_hash, flags = db. Db_create)

3. Inserting or modifying data in a database

Adb.put (' Skidoo ', ' all ') #加入数据库adb. Put (' for ', ' Change the data ') #改变数据库的数据

4. Close the database

Adb.close ()

Hopefully this article will help you with Python programming.

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