Edit images externally in Windows

Edit_Images_Externally_Windows.py

# -*- mode: Python ; coding: utf-8 -*-

# 2018-04-12, V1.01 Win
# Based on "Edit Images Externally, Updated (Mac OSx)"
# Original addon: https://ankiweb.net/shared/info/1575330182
#
# This edit only has the only change, to simply specify the program you want to 
# open the pictures in, as requested by OtterBrah
#
# License: GNU GPL, version 3 or later; http://www.gnu.org/copyleft/gpl.html
# Use it AS IS on your own risk.

# ------- USER SETTINGS -------
# if you want to use a custom editor, paste the path below, e.g.: 
# open_command = "C:\Program Files\paint.net\PaintDotNet.exe"
# You dont need to escape whitespaces

open_command = ""

# ----- END USER SETTINGS ----- 

if open_command:
    open_command = "\"" + open_command + "\" "

# import the main window object (mw) from aqt
from aqt import mw
# import the "show info" tool from utils.py
from aqt.utils import showInfo
# import all of the Qt GUI library
from aqt.qt import *

#import regular expressions
import re
import os
import subprocess
from anki.hooks import addHook
from anki.hooks import wrap
from aqt.editor import Editor
from aqt.utils import showInfo

# We're going to add a menu item below. First we want to create a function to
# be called when the menu item is activated.

def edit_pic_externally(editor):
    #throw all the fields in string form into an array
    editor.loadNote()
    for i in range(len(editor.note.fields)):
        field = editor.note.fields[i]
        #iterate through the array and find all image paths
        #put all image paths in an array
        pictures = re.findall(r'\<img src="(.*?)"', field)
        #load the path to the users collection 
        collection_path = mw.col.media.dir() +"\\"
        #for each picture get the full path and then open it externally
        for picture in pictures: 
            if picture:
                full_image_path = os.path.join(collection_path, picture)
                #escape spaces in image path
                subprocess.Popen(open_command + "\"" + full_image_path + "\"", shell = True)

                # Uncomment lines below to copy the command to clipboard
                # command = 'echo ' + open_command + "\"" + full_image_path + "\"" + '| clip'
                # os.system(command)

def button_pressed(self):
    edit_pic_externally(self)

def my_setup_buttons(self):
    # - size=False tells Anki not to use a small button
    # - the lambda is necessary to pass the editor instance to the
    #   callback, as we're passing in a function rather than a bound
    #   method
    self._addButton("mybutton", lambda s=self: button_pressed(self),
                    text="Edit Images", size=False, tip="Edit images in external editor.")

Editor.setupButtons = wrap(Editor.setupButtons, my_setup_buttons)

Thanks for your development!
I am a chinese anki fans, and download your add-on recently.
Some errors happen. Here is the feedback from anki:

一个插件发生了错误。
请把它报告在插件的论坛上:
https://anki.tenderapp.com/discussions/add-ons

Traceback (most recent call last):
File "C:\Users\wangle\AppData\Roaming\Anki2\addons\Edit_Images_Externally_Updated_Windows.py", line 73, in
self._addButton("mybutton", lambda s=self: button_pressed(self),
File "C:\Users\wangle\AppData\Roaming\Anki2\addons\Edit_Images_Externally_Updated_Windows.py", line 66, in button_pressed
edit_pic_externally(self)
File "C:\Users\wangle\AppData\Roaming\Anki2\addons\Edit_Images_Externally_Updated_Windows.py", line 59, in edit_pic_externally
subprocess.Popen(open_command + """ + full_image_path + """, shell = True)
File "subprocess.py", line 679, in init
File "subprocess.py", line 870, in _execute_child
UnicodeEncodeError: 'ascii' codec can't encode characters in position 39-40: ordinal not in range(128)

Here is some information may help you find the problem:
1.the way I use the add-on:
I review a card and I click edit button then choose an image that I want to edit by clicking the button "Edit Images".but some errors happen.
2.my running environment:
win10
anki 2.0.47
3. I choose the default mode: open_command = "", and I can open an image by double click an image and the execute softer is window' own.
4. I also try to use PaintDotNet.exe , but still call errors.

I really need an add-on to provide the function to edit images while reviewing.
hope you can help me!

MY email is 476384374@qq.com.