After certain file size records not getting added about unqlite-python HOT 2 CLOSED

for i, cajero_json in enumerate(cajeros_json):
    db = UnQLite('cajeros.db')
    db.open()
    cajero = {}
    cajero['id'] = cajero_json['id']
    cajero['clave_institucion'] = cajero_json['cb']
    cajero['lat'] = cajero_json['l']['lat']
    cajero['lon'] = cajero_json['l']['lng']
    cajero['nombre_institucion'] = NOMBRES[cajero['clave_institucion']]
    try:
        if not db.exists(cajero['id']):
            url_cajero = CAJERO_URL + '?id=' + str(cajero['id']) + '&banco=' + str(cajero['clave_institucion'])
            cajero_json = requests.get(url_cajero).json()['contenido']
            cajero['cp'] = str(cajero_json['cp'])
            cajero['horario'] = cajero_json['hs']
            cajero['direccion'] = cajero_json['d']
            cajero['actualizacion'] = str(datetime.datetime.now())
            db[cajero['id']] = cajero
    except UnicodeEncodeError:
        print 'UnicodeEncodeError'
        print cajero
        pass
    finally:
        db.close()