Python MySql Insert not working

I am using python MySQL API to connect to Mysql database from python program. I am facing a problem from few days. I am unable to insert records into the database and dont know whats the reason. Here is the way i connect and insert records into the database.

db = MySQLdb.connect("localhost","root","padmaramulu","pdfsearch" )
cursor = db.cursor()
#cursor.execute("""CREATE TABLE IF NOT EXISTS documents (docid INT NOT NULL ,PRIMARY KEY(docid),docname CHAR(30)) engine=innodb""")
temp = "hello";number = 2;
cursor.execute( 'insert into documents(docid,docname) values("%d","%s")' % (number,temp) )
db.close()

Why is it so?

Solution 1:

Before closing the connection, you should add db.commit().

Solution 2:

if you are using InnoDB engine in MySQL you should add

db.commit() 

else change your MySQL engine into MyISAM no need to change anything in code.