I'm making progress... There's still a lot left to do, but it's looking good so far.

This is a bug in the example, sorry, It should work if you just replace v with widget_view.

@jmv38 This is the best I could come up with:

import appex
import photos
from objc_util import ObjCInstance

def assets_for_attachments(attachments):
    all_assets = photos.get_assets()
    matching_assets = []
    for a in all_assets:
        objc_asset = ObjCInstance(a)
        path_orig = str(objc_asset.pathForOriginalFile())
        path_edit = str(objc_asset.pathForFullsizeRenderImageFile())
        if path_orig in attachments or path_edit in attachments:
            matching_assets.append(a)
    return matching_assets

attachments = appex.get_attachments()
assets = assets_for_attachments(attachments)
# Now you can use the photos module to manipulate the assets...

This is the bookmark bar (which can include workflow shortcuts), but this feature is only available on iPad.

No need for objc_util, you can use JavaScript:

selected_text = web_view.eval_js('document.getSelection().toString()')

If you really need to modify photos from the app extension, here's a hackish way you could do that. It's somewhat slow, and relies on undocumented (private) API, but it should work:

import appex
import photos
from objc_util import ObjCInstance

def assets_for_attachments(attachments):
    all_assets = photos.get_assets()
    matching_assets = []
    for a in all_assets:
        path = str(ObjCInstance(a).pathForOriginalFile())
        if path in attachments:
            matching_assets.append(a)
    return matching_assets

attachments = appex.get_attachments()
assets = assets_for_attachments(attachments)
# Now you can use the photos module to manipulate the assets... (as in previous example)

You cannot modify a photo in-place that was passed to the app extension.

You can however use the photos module for that. Here's a simple example that lets you pick a photo, and set its creation date with a date picker:

import photos, dialogs

asset = photos.pick_asset()
new_date = dialogs.datetime_dialog('Set Creation Date')
asset.creation_date = new_date

I'd recommend setting the scale attribute. Setting the size (as @ccc has shown) would also work, but you would need to set it again when you change the texture of a sprite.

It might actually be easier to set the scale of the entire scene instead of scaling each card individually.

@krizex Pythonista itself doesn't use the iAd framework, so you'd have to load it first:

objc_util.load_framework('iAd')

I think this function is undocumented, it's equivalent to:

objc_util.ObjCClass('NSBundle').bundleWithPath_('/System/Frameworks/iAd.framework').load()

If your search term contains spaces, or other characters that aren't allowed in a URL, you'll need to quote them, e.g. foo bar => foo%20bar.

import urllib.parse
search_term = urllib.parse.quote(sender.text, '')
webview.load_url('https://www.google.com/search?q=' + search_term)