Kivy 在使用 Pillow 时退出循环

Question

我有一个简单的 kivy 应用程序，它接受三个.tif文件并创建每个文件的副本。for loop由于某种原因，当对图像进行某些操作时，Kivy 会自动退出。该函数在 kivy 之外没有任何问题。我的终端中也没有生成任何错误。看起来和using有冲突pillow，但是没有错误信息很难排查。

主要.py

from kivy.app import App
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.lang.builder import Builder
from PIL import Image
import os

path_in = 'D:/TIF_STORAGE/'
path_out = 'D:/Convert/'


def manip_img(in_pth, out_pth):
    i = 0
    for img in os.listdir(in_pth):
        img_open = Image.open(in_pth + img)
        print(img_open)   
        # Does not get to the next step
        conv = img_open.copy()
        print(conv)       
        conv.save(out_pth + str(i) + '.tif')        
        i = i + 1

class WindowManager(ScreenManager):
    pass


class MainWindow(Screen):
    def run_main(self):
        manip_img(path_in, path_out)
            
            
kv_main = Builder.load_file('main.kv')


class MyApp(App):
    def build(self):
        return kv_main
        

if __name__ == '__main__':
    MyApp().run()

主干电压

WindowManager:
    MainWindow:

<MainWindow>
    BoxLayout:
        orientation: "vertical"
        Button:
            text: "Run"
            on_release: root.run_main()

输出

(GUI) D:\KIVY_new\testing>python main.py
[INFO   ] [Logger      ] Record log in C:\Users\name\.kivy\logs\kivy_21-12-03_63.txt
[INFO   ] [Kivy        ] v2.0.0
[INFO   ] [Kivy        ] Installed at "C:\Users\name\anaconda3\envs\GUI\lib\site-packages\kivy\__init__.py"
[INFO   ] [Python      ] v3.8.12 (default, Oct 12 2021, 03:01:40) [MSC v.1916 64 bit (AMD64)]
[INFO   ] [Python      ] Interpreter at "C:\Users\name\anaconda3\envs\GUI\python.exe"
[INFO   ] [Factory     ] 186 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] GLEW initialization succeeded
[INFO   ] [GL          ] Backend used <glew>
[INFO   ] [GL          ] OpenGL version <b'4.6.0 NVIDIA 496.76'>
[INFO   ] [GL          ] OpenGL vendor <b'NVIDIA Corporation'>
[INFO   ] [GL          ] OpenGL renderer <b'NVIDIA GeForce RTX 2080/PCIe/SSE2'>
[INFO   ] [GL          ] OpenGL parsed version: 4, 6
[INFO   ] [GL          ] Shading version <b'4.60 NVIDIA'>
[INFO   ] [GL          ] Texture max size <32768>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Base        ] Start application main loop
[INFO   ] [GL          ] NPOT texture support is available
<PIL.TiffImagePlugin.TiffImageFile image mode=RGBA size=800x800 at 0x1CF5C1497F0>

(GUI) D:\KIVY_new\testing>

简单的.py脚本

from PIL import Image
import os

path_in = 'D:/TIF_STORAGE/'
path_out = 'D:/Convert/'


def manip_img(in_pth, out_pth):
    i = 0
    for img in os.listdir(in_pth):
        img_open = Image.open(in_pth + img)
        print(img_open)
        # Does get to the next step
        conv = img_open.copy()
        print(conv)
        conv.save(out_pth + str(i) + '.tif') 
        i = i + 1
        
        
manip_img(path_in, path_out)

输出

(GUI) D:\>python delete_script.py
<PIL.TiffImagePlugin.TiffImageFile image mode=RGBA size=800x800 at 0x24155CC6DF0>
<PIL.Image.Image image mode=RGBA size=800x800 at 0x24155CA7130>
<PIL.TiffImagePlugin.TiffImageFile image mode=RGBA size=800x800 at 0x241578E3BE0>
<PIL.Image.Image image mode=RGBA size=800x800 at 0x24155CC6DF0>
<PIL.TiffImagePlugin.TiffImageFile image mode=RGBA size=800x800 at 0x241578E3760>
<PIL.Image.Image image mode=RGBA size=800x800 at 0x241578D5160>