mirror of https://github.com/python/cpython
21 lines
705 B
Python
21 lines
705 B
Python
import sqlite3
|
|
|
|
con = sqlite3.connect(":memory:")
|
|
con.execute("create table lang (id integer primary key, name varchar unique)")
|
|
|
|
# Successful, con.commit() is called automatically afterwards
|
|
with con:
|
|
con.execute("insert into lang(name) values (?)", ("Python",))
|
|
|
|
# con.rollback() is called after the with block finishes with an exception, the
|
|
# exception is still raised and must be caught
|
|
try:
|
|
with con:
|
|
con.execute("insert into lang(name) values (?)", ("Python",))
|
|
except sqlite3.IntegrityError:
|
|
print("couldn't add Python twice")
|
|
|
|
# Connection object used as context manager only commits or rollbacks transactions,
|
|
# so the connection object should be closed manually
|
|
con.close()
|