Fixed #9628 -- Use `pysqlite2` for database backend, if installed.

Python 2.3 and 2.4 require pysqlite2 (http://pysqlite.org/).

Python 2.5 and later use the sqlite3 module in the standard library.

Python 2.5 and later can use a pysqlite2 module or the sqlite3 module in the

standard library.

"""

from django.db.backends import *

try:

    try:

        from sqlite3 import dbapi2 as Database

    except ImportError, e1:

        from pysqlite2 import dbapi2 as Database

    except ImportError, e1:

        from sqlite3 import dbapi2 as Database

except ImportError, exc:

    import sys

    from django.core.exceptions import ImproperlyConfigured

    if sys.version_info < (2, 5, 0):

        module = 'pysqlite2'

    else:

        module = 'sqlite3'

        module = 'pysqlite2 module'

        exc = e1

    raise ImproperlyConfigured, "Error loading %s module: %s" % (module, exc)

    else:

        module = 'either pysqlite2 or sqlite3 modules (tried in that order)'

    raise ImproperlyConfigured, "Error loading %s: %s" % (module, exc)

try:

    import decimal