Shortcut functions that make system supported dialogs work.

osa_dialogs.py

import json, subprocess

def choose_file(prompt='Select a file:', file_types=[], multipleFiles=False):
  args = [
    'osascript',
    '-e',
    '%s(choose file%s with prompt "%s" of type{%s})' % (
      'set theList to ' if multipleFiles else 'POSIX path of ',
      ' with multiple selections allowed' if multipleFiles else '',
      json.dumps(prompt)[1:-1],
      json.dumps(file_types)[1:-1]
    )
  ]
  if multipleFiles:
    args += [
      '-e',
      'repeat with a from 1 to length of theList',
      '-e',
      'set item a of theList to POSIX path of item a of theList',
      '-e',
      'end repeat',
      '-e',
      'set AppleScript\'s text item delimiters to ";"',
      '-e',
      'theList as string'
    ]
  output, error = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
  output = output.strip()
  return output.split(';') if len(output) else []

def choose_folder(prompt='Select a folder:', multipleFolders=False):
  args = [
    'osascript',
    '-e',
    '%s(choose folder%s with prompt "%s")' % (
      'set theList to ' if multipleFolders else 'POSIX path of ',
      ' with multiple selections allowed' if multipleFolders else '',
      json.dumps(prompt)[1:-1]
    )
  ]
  if multipleFolders:
    args += [
      '-e',
      'repeat with a from 1 to length of theList',
      '-e',
      'set item a of theList to POSIX path of item a of theList',
      '-e',
      'end repeat',
      '-e',
      'set AppleScript\'s text item delimiters to ";"',
      '-e',
      'theList as string'
    ]
  output, error = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
  output = output.strip()
  return output.split(';') if len(output) else []

def input(message, title='', defaultValue='', icon=None):
  process = subprocess.Popen(
    [
      'osascript',
      '-e',
      'display dialog "%s" default answer "%s" with title "%s"%s' % (
        json.dumps(message)[1:-1],
        json.dumps(defaultValue)[1:-1],
        json.dumps(title)[1:-1],
        ((' with icon %s' % icon) if icon in ['caution', 'note', 'stop'] else (' with icon POSIX file %s' % json.dumps(icon))) if icon else ''
      ),
      '-e',
      'text returned of result'
    ],
    stdout=subprocess.PIPE,
    stderr=subprocess.PIPE
  )
  output, error = process.communicate()
  return output.strip()

def prompt(prompt, title='', buttons=['OK'], default_index=None, cancel_index=None, icon=None):
  process = subprocess.Popen(
    [
      'osascript',
      '-e',
      'display dialog "%s" buttons {%s}%s%s with title "%s"%s' % (
        json.dumps(prompt)[1:-1],
        json.dumps(buttons)[1:-1],
        '' if default_index is None else (' default button %s' % json.dumps(buttons[default_index])),
        '' if cancel_index is None else (' cancel button %s' % json.dumps(buttons[cancel_index])),
        json.dumps(title)[1:-1],
        ((' with icon %s' % icon) if icon in ['caution', 'note', 'stop'] else (' with icon POSIX file %s' % json.dumps(icon))) if icon else ''
      )
    ],
    stdout=subprocess.PIPE,
    stderr=subprocess.PIPE
  )
  output, error = process.communicate()
  output = ('Cancel' if cancel_index is None else buttons[cancel_index]) if error else output[output.index(':')+1:].strip()
  try:
    return buttons.index(output)
  except Exception, e:
    return -1

~Readme.md

Dialog Box For Choosing Files

osa_dialogs.choose_file(prompt='Select a file:', file_types=[], multipleFiles=False)

• Example

  # Select 1 or more images
  pprint(osa_dialogs.choose_file(prompt="Select 1 or more images:", file_types=['public.image'], multipleFiles=True))

Dialog Box For Choosing Folders

osa_dialogs.choose_folder(prompt='Select a folder:', multipleFolders=False)

• Example

  # Select 1 or more folders
  pprint(osa_dialogs.choose_file(prompt="Select 1 or more folders:", multipleFolders=True))

Dialog Box With Input Box

osa_dialogs.input(message, title='', defaultValue='', icon=None)

• Example

  print osa_dialogs.input('What is your name?', 'Name', 'Chris', icon='caution')

Dialog Box With Custom Buttons

osa_dialogs.prompt(prompt, title='', buttons=['OK'], default_index=None, cancel_index=None, icon=None)

• Example

  # Show prompt
  print osa_dialogs.prompt('Hi, I hope you are doing well today!', 'Hello', ['Yes','No','Cancel'], default_index=0, cancel_index=2, icon='note')