import sqlite3
conn=sqlite3.connect('pyu')
cusor=conn.cursor()
cusor.execute('create table if not exists pyu( name varchar (20) ,number int  (10))')
cusor.execute('insert into pyu( name,number)values ("a",1111)')
cusor.execute('insert into pyu( name,number)values ("b",2222)')
cusor.execute('insert into pyu( name,number)values ("c",3333)')
cusor.execute('select * from pyu')
print(cusor.fetchmany(3))
cusor.execute('update pyu set number = 4444 where number =3333')
cusor.execute('select * from pyu')
print(cusor.fetchmany(3))
conn.close()