How to use gphoto2 - 10 common examples

def main():
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    computer_files = list_computer_files()
    camera = gp.check_result(gp.gp_camera_new())
    gp.check_result(gp.gp_camera_init(camera))
    print('Getting list of files from camera...')
    camera_files = list_camera_files(camera)
    if not camera_files:
        print('No files found')
        return 1
    print('Copying files...')
    for path in camera_files:
        info = get_camera_file_info(camera, path)
        timestamp = datetime.fromtimestamp(info.file.mtime)
        folder, name = os.path.split(path)
        dest_dir = get_target_dir(timestamp)
        dest = os.path.join(dest_dir, name)
        if dest in computer_files:

def main():
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    camera = gp.Camera()
    camera.init()
    files = list_files(camera)
    if not files:
        print('No files found')
        return 1
    print('File list')
    print('=========')
    for path in files[:10]:
        print(path)
    print('...')
    for path in files[-10:]:
        print(path)
    info = get_file_info(camera, files[-1])
    print
    print('File info')

logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    # open camera connection
    camera = gp.check_result(gp.gp_camera_new())
    gp.check_result(gp.gp_camera_init(camera))
    # get configuration tree
    config = gp.check_result(gp.gp_camera_get_config(camera))
    # find the capture target config item
    capture_target = gp.check_result(
        gp.gp_widget_get_child_by_name(config, 'capturetarget'))
    # print current setting
    value = gp.check_result(gp.gp_widget_get_value(capture_target))
    print('Current setting:', value)
    # print possible settings
    for n in range(gp.check_result(gp.gp_widget_count_choices(capture_target))):
        choice = gp.check_result(gp.gp_widget_get_choice(capture_target, n))
        print('Choice:', n, choice)
    # clean up
    gp.check_result(gp.gp_camera_exit(camera))
    return 0

# add our own callback, with data
    print('Using Python callback, with data')
    print('================================')
    callback_obj = gp.check_result(
        gp.gp_log_add_func(gp.GP_LOG_VERBOSE, callback, 'some data'))
    print('callback_obj', callback_obj)
    # create an error
    gp.gp_camera_init(camera)
    # uninstall callback
    del callback_obj
    # set gphoto2 to use Python's logging directly
    print('Using Python logging')
    print('====================')
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    # create an error
    gp.gp_camera_init(camera)
    return 0

def main():
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    camera = gp.Camera()
    camera.init()
    files = list_files(camera)
    if not files:
        print('No files found')
        return 1
    print('File list')
    print('=========')
    for path in files[:10]:
        print(path)
    print('...')
    for path in files[-10:]:
        print(path)
    print()
    print('Exif data')
    print('=========')

def main():
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    camera = gp.check_result(gp.gp_camera_new())
    gp.check_result(gp.gp_camera_init(camera))
    print('Getting list of files')
    files = list_files(camera)
    if not files:
        print('No files found')
        return 1
    path = files[0]
    print('Copying %s to memory in 100 kilobyte chunks' % path)
    folder, name = os.path.split(path)
    file_info = gp.check_result(gp.gp_camera_file_get_info(
        camera, folder, name))
    data = bytearray(file_info.file.size)
    view = memoryview(data)
    chunk_size = 100 * 1024
    offset = 0
    while offset < len(data):
        bytes_read = gp.check_result(gp.gp_camera_file_read(
            camera, folder, name, gp.GP_FILE_TYPE_NORMAL,
            offset, view[offset:offset + chunk_size]))
        offset += bytes_read
        print(bytes_read)
    print(' '.join(map(str, data[0:10])))
    image = Image.open(io.BytesIO(data))
    image.show()
    gp.check_result(gp.gp_camera_exit(camera))
    return 0

def main():
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    camera = gp.Camera()
    camera.init()
    print('Capturing image')
    file_path = camera.capture(gp.GP_CAPTURE_IMAGE)
    print('Camera file path: {0}/{1}'.format(file_path.folder, file_path.name))
    target = os.path.join('/tmp', file_path.name)
    print('Copying image to', target)
    camera_file = camera.file_get(
        file_path.folder, file_path.name, gp.GP_FILE_TYPE_NORMAL)
    camera_file.save(target)
    subprocess.call(['xdg-open', target])
    camera.exit()
    return 0

print('Copying files...')
    for path in camera_files:
        info = get_camera_file_info(camera, path)
        timestamp = datetime.fromtimestamp(info.file.mtime)
        folder, name = os.path.split(path)
        dest_dir = get_target_dir(timestamp)
        dest = os.path.join(dest_dir, name)
        if dest in computer_files:
            continue
        print('%s -> %s' % (path, dest_dir))
        if not os.path.isdir(dest_dir):
            os.makedirs(dest_dir)
        camera_file = gp.check_result(gp.gp_camera_file_get(
            camera, folder, name, gp.GP_FILE_TYPE_NORMAL))
        gp.check_result(gp.gp_file_save(camera_file, dest))
    gp.check_result(gp.gp_camera_exit(camera))
    return 0

def main():
    # use Python logging
    logging.basicConfig(
        format='%(levelname)s: %(name)s: %(message)s', level=logging.WARNING)
    callback_obj = gp.check_result(gp.use_python_logging())
    # open camera connection
    camera = gp.check_result(gp.gp_camera_new())
    gp.check_result(gp.gp_camera_init(camera))
    # get configuration tree
    config = gp.check_result(gp.gp_camera_get_config(camera))
    # find the capture target config item
    capture_target = gp.check_result(
        gp.gp_widget_get_child_by_name(config, 'capturetarget'))
    # print current setting
    value = gp.check_result(gp.gp_widget_get_value(capture_target))
    print('Current setting:', value)
    # print possible settings
    for n in range(gp.check_result(gp.gp_widget_count_choices(capture_target))):
        choice = gp.check_result(gp.gp_widget_get_choice(capture_target, n))
        print('Choice:', n, choice)
    # clean up
    gp.check_result(gp.gp_camera_exit(camera))
    return 0

'expoptions'    : '',
        'piPreviewFile' : ''
        }

    args = request.args.to_dict()
    if args.get('preview'):
        cameraData['piPreviewFile'] = PI_PREVIEW_FILE + '?' + str(calendar.timegm(time.gmtime())) #Adds a unique suffix so the browser always downloads the file

    if args.get('wakeCamera'):
        writeString("WC") # Sends the WAKE command to the Arduino
        time.sleep(1);    # (Adds another second on top of the 0.5s baked into WriteString)
        app.logger.debug('Returned after detecting camera wake command')
        return redirect(url_for('camera'))

    try:
        camera = gp.Camera()
        context = gp.gp_context_new()
        camera.init(context)
        config = camera.get_config(context)
        cameraTimeAndDate = "Unknown"
        try:
            # find the date/time setting config item and get it
            # name varies with camera driver
            #   Canon EOS350d - 'datetime'
            #   PTP - 'd034'
            for name, fmt in (('datetime', '%Y-%m-%d %H:%M:%S'),
                              ('datetimeutc', None),
                              ('d034',     None)):
                OK, datetime_config = gp.gp_widget_get_child_by_name(config, name)
                if OK >= gp.GP_OK:
                    widget_type = gp.check_result(gp.gp_widget_get_type(datetime_config))
                    if widget_type == gp.GP_WIDGET_DATE: