Question

以下程序适用于目录中的第一个.jpg。第二次调用时，它会收到一个“ _tkinter.TclError：图像 ““ pyimage2”不存在”异常。为什么会出现错误？有没有办法重用第一张图片而不是创建第二张图片？

导入sys，os 如果sys.version_info [0] == 2：
进口Tkinter tkinter = Tkinter 其他：导入tkinter 从PIL导入ImageTk

def showPIL(pilImage):
    root = tkinter.Tk()
    w, h = root.winfo_screenwidth(), root.winfo_screenheight()
    root.overrideredirect(1)
    root.geometry("%dx%d+0+0" % (w, h))
    root.focus_set()
    root.bind("<Escape>", lambda e: (e.widget.withdraw(), e.widget.quit()))
    canvas = tkinter.Canvas(root,width=w,height=h)
    canvas.pack()
    canvas.configure(background='black')
    imgWidth, imgHeight = pilImage.size
 # resize photo to full screen 
    ratio = min(w/imgWidth, h/imgHeight)
    imgWidth = int(imgWidth*ratio)
    imgHeight = int(imgHeight*ratio)
    pilImage = pilImage.resize((imgWidth,imgHeight), Image.ANTIALIAS)   
    image = ImageTk.PhotoImage(pilImage)
    print(image)
    imagesprite = canvas.create_image(w/2,h/2,image=image)
    root.mainloop()

names = os.listdir("E://Users//scott//Pictures")
print(names)
for file in names:
    print(file)
    if file[-4:] == ".jpg":
        file=Image.open("E://Users//scott//Pictures//"+file)
        showPIL(file)

这是控制台输出。追溯（最近一次通话）：文件   “ e：\ Users \ scott \ Documents \ Python \ image test.py”，第36行，在       showPIL（file）在showPIL中的第27行，文件“ e：\ Users \ scott \ Documents \ Python \ image test.py”       imagesprite = canvas.create_image（w / 2，h / 2，image = image）文件“ C：\ Program Files \ Python37 \ lib \ tkinter__init __。py”，第2486行，在   create_image       返回self._create（'image'，args，kw）文件_create中的文件“ C：\ Program Files \ Python37 \ lib \ tkinter__init __。py”，行2477       *（参数+ self._options（cnf，kw））））   _tkinter.TclError：图像“ pyimage2”不存在



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Answer 1

搜索后，我发现第一个问题tkinter.Tk（）被多次调用，而必须调用     只有一次，所以我将其从showPIL函数移到了     初始化。下一个问题是mainloop阻塞，所以我     用root.update_idletasks（）和     root.update（）。以下是我期望和需要的作品：

import sys, os
if sys.version_info[0] == 2:  # the tkinter library changed it's name from Python 2 to 3.
    import Tkinter
    tkinter = Tkinter #I decided to use a library reference to avoid potential naming conflicts with people's programs.
else:
    import tkinter
from PIL import Image, ImageTk
import time

root = tkinter.Tk()
w, h = root.winfo_screenwidth(), root.winfo_screenheight()
root.overrideredirect(1)
root.geometry("%dx%d+0+0" % (w, h))
root.focus_set()
canvas = tkinter.Canvas(root,width=w,height=h)
canvas.pack()
canvas.configure(background='black')


def showPIL(pilImage):
    imgWidth, imgHeight = pilImage.size
 # resize photo to full screen 
    ratio = min(w/imgWidth, h/imgHeight)
    imgWidth = int(imgWidth*ratio)
    imgHeight = int(imgHeight*ratio)
    pilImage = pilImage.resize((imgWidth,imgHeight), Image.ANTIALIAS)   
    image = ImageTk.PhotoImage(pilImage)
    imagesprite = canvas.create_image(w/2,h/2,image=image)
    root.update_idletasks()
    root.update()
#    root.bind("<Escape>", lambda e: (e.widget.withdraw(), e.widget.quit()))


names = os.listdir("E://Users//scott//Pictures")
print(names)
for file in names:

    print(file)
    if file[-4:] == ".jpg":
        file=Image.open("E://Users//scott//Pictures//"+file)
        showPIL(file)

        time.sleep(5)

全屏显示Python图片

1 个答案: