Interrogate LaunchServices using #PyObjC to query file paths for default app handler, all possible app handlers, and the UTI

LSFileInfo example

xomg% python LSFileInfo.py dylib-map.sqlite
('\n', u'/Users/andre/bin/dylib-map.sqlite')
('UTI: ', u'dyn.ah62d4rv4ge81g6pqrf4gn')
('default app: ', file:///Applications/DB%20Browser%20for%20SQLite.app/)
('all apps: ', (
    "file:///Applications/DB%20Browser%20for%20SQLite.app/"
))

LSFileInfo.py

#!/usr/bin/env python

import LaunchServices as ls
from Foundation import NSURL
from sys import argv

for arg in argv[1:]:
    url = NSURL.fileURLWithPath_(arg)
    if url == None: continue
    print("\n", url.path())
    defaultApp = ls.LSGetApplicationForURL(url, ls.kLSRolesAll, None, None)[-1]
    allApps = ls.LSCopyApplicationURLsForURL(url, ls.kLSRolesAll)
    OSStatus, infos = ls.LSCopyItemInfoForURL(url, ls.kLSRequestAllInfo, None)
    uti = None
    # UTI from extension
    if infos[3] != None:
        uti = ls.UTTypeCreatePreferredIdentifierForTag(ls.kUTTagClassFilenameExtension, infos[3], ls.kUTTypeData)
    if uti is None:
        # No file extension, so try OSType
        typeString = ls.UTCreateStringForOSType(infos.filetype)
        if typeString != None:
            uti = ls.UTTypeCreatePreferredIdentifierForTag(ls.kUTTagClassOSType, typeString, ls.kUTTypeData)
        else:
            uti = "Can't tell?!"
    print("UTI: ", uti)
    print("default app: ", defaultApp)
    print("all apps: ", allApps)

$ python ~/bin/LSFileInfo.py ~/manatee.mp4 

/Users/andre/manatee.mp4
UTI:  public.mpeg-4
default app:  file:///Applications/QuickTime%20Player.app/
all apps:  (
    "file:///Applications/Compressor.app/",
    "file:///Applications/QuickTime%20Player.app/",
    "file:///Applications/IINA.app/"

$ python ~/bin/LSFileInfo.py ~/Documents/ejabberd-pam-working.yml 

/Users/andre/Documents/ejabberd-pam-working.yml
UTI:  dyn.ah62d4rv4ge81w5pq
default app:  None

$ python ~/bin/LSFileInfo.py ~/Documents/MDKMobileDevice.h 

/Users/andre/Documents/MDKMobileDevice.h
UTI:  public.c-header
default app:  file:///Applications/Xcode.app/
all apps:  (
    "file:///Applications/Microsoft%20Word.app/",
    "file:///Applications/TextEdit.app/",
    "file:///Applications/Older%20Xcodes/Xcode_9M136h_Tigris15A297_2017-06-22-14-03-21.222659.app/",
    "file:///Applications/Microsoft%20Excel.app/",
    "file:///Applications/Pages.app/",
    "file:///Applications/Quip.app/",
    "file:///Applications/Numbers.app/",
    "file:///Applications/Notes.app/",
    "file:///Applications/LibreOffice.app/",
    "file:///Applications/Older%20Xcodes/Xcode_9M137e_2017-09-14-14-50-56.234467.app/",
    "file:///Applications/Xcode.app/"
)