Allowed using the sqlite3 backend as much as possible without _sqlite3.

import _sqlite3  # isort:skip

import codecs

import contextlib

import copy

            c.execute('PRAGMA foreign_keys = %s' % int(self._initial_pragma_fk))

    def quote_value(self, value):

        # The backend "mostly works" without this function and there are use

        # cases for compiling Python without the sqlite3 libraries (e.g.

        # security hardening).

        import _sqlite3

        try:

            value = _sqlite3.adapt(value)

        except _sqlite3.ProgrammingError: