Python - gphoto2: how to convert output to JSON or python array

Question

I am working with gphoto2, most commands are working, but I don't know how to use the output from command-line for next operations.

For example:

I want to get list of photos in camera

command = ["sudo","gphoto2","--get-all-files","--skip-existing"]
call(command)

Result:

There is no file in folder '/'.                                                
There is no file in folder '/store_00010001'.
There is no file in folder '/store_00010001/DCIM'.
There are 6 files in folder '/store_00010001/DCIM/100EOS5D'.
#1     OM6_0018.JPG               rd 12335 KB image/jpeg
#2     OM6_0019.JPG               rd 12686 KB image/jpeg
#3     OM6_0020.JPG               rd 12500 KB image/jpeg
#4     OM6_0021.JPG               rd 12438 KB image/jpeg
#5     OM6_0022.JPG               rd 12668 KB image/jpeg
#6     OM6_0023.JPG               rd 12760 KB image/jpeg

What I aim to get output in JSON or Python array:

['OM6_0018.JPG', 'OM6_0019.JPG', 'OM6_0020.JPG', ...]

Any suggestion is appreciated.

Answer 1

So, I have no idea how gphoto works, but I am going to take a wild guess that instead of doing a subprocess call, you should instead just do this:

import gphoto2 as gp

def list_files(camera, path='/'):
    result = []
    # get files
    for name, value in gp.check_result(
            gp.gp_camera_folder_list_files(camera, path)):
        result.append(os.path.join(path, name))
    # read folders
    folders = []
    for name, value in gp.check_result(
            gp.gp_camera_folder_list_folders(camera, path)):
        folders.append(name)
    # recurse over subfolders
    for name in folders:
        result.extend(list_files(camera, os.path.join(path, name)))
    return result

camera = ... #TODO set camera here
path = ...  #TODO set path here
files = list_files(camera, path)

See here for full example: https://github.com/jim-easterbrook/python-gphoto2/blob/master/examples/list-files.py