SQLite3x.disconnect
def disconnect(self):
    """
    Drop connection to database
    Commit changes and close connection
    """
Read more about connection in sqlite3x-connect.md and postgresqlx-connect.md
Examples
import sqllex as sx
db = sx.SQLite3x(path='database.db')
# db = sx.PostgreSQL(...)
db.connect()
# ------------------ ANY INTERACTION WITH DATABASE -----------------------
db.create_table(
    "numbers", 
    {
        "value": [sx.INTEGER]
    }, 
    IF_NOT_EXIST=True
)
for i in range(1000):
    db["numbers"].insert(i)
# ---------------------------- THE END  ----------------------------------
db.disconnect()