什么是
Python相当于Perl的DBI以及如何使用它？更具体地说,Python等效于以下Perl代码是什么？
use DBI; # connect to a MysqL database my $dbh = DBI->connect("dbi:MysqL:database=$database; host=localhost; port=3306",$user,$pass); # select and read a few rows my $sth = $dbh->prepare("SELECT id,name FROM table WHERE id <= ?;"); $sth->execute(321); while (my @row = $sth->fetchrow_array) { my $id = $row[0]; my $name = $row[1]; print "$id. $name\n"; } # write to the database $sth = $dbh->prepare("INSERT INTO table (id,name) VALUES (?,?);"); $sth->execute(123,"foo");
解决方法
import MysqLdb.cursors db = MysqLdb.connect(db=database,host=localhost,port=3306,user=user,passwd=pass,cursorclass=MysqLdb.cursors.DictCursor) cur = db.cursor() #this is not string interpolation,everything is quoted for you automatically cur.execute("select id,name from table where id = %s",(321,)) for row in cur.fetchall(): print "%s. %s" % (row['id'],row['name']) cur.execute("insert into table (id,name) values (%s,%s)",(123,'foo')) db.commit() # required,because autocommit is off by default
Python数据库API使用常见的convention,在不同的数据库中几乎相同(但不完全！).您可以阅读MysqLdb文档here.
还有一个功能更丰富的MysqL接口,称为@L_301_3@.它具有真正的参数化(不仅仅是美化字符串插值),服务器端游标,数据流等.