回答編集履歴
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追記
test
CHANGED
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@@ -3,3 +3,75 @@
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[tkinterのcanvasのevent時image書き換えで画像が表示されなかったからごり押しした](https://qiita.com/iCyP/items/e76ab6f584851c39f077)
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---
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【追記】
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```Python
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import tkinter as tk
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import tkinter.filedialog as tkfiledialog
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import cv2
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a=20
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b=650
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c='#c0c0c0'
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root = tk.Tk()
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root.state('zoomed')
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root.title("採点支援ソフト「採点切り！！")
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root.configure(bg='#c0c0c0')
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#root.iconbitmap(r"C:\Users\shunsuke\Pictures\test.ico")
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global haruna #追加
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def ni():
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global haruna #追加
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typ = [('pngファイル','*.png')]
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dir = 'C:\pg'
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fle = tkfiledialog.askopenfilename(filetypes = typ, initialdir = dir)
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haruna = tk.PhotoImage(file=fle)
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canvas = tk.Canvas(bg="black", width=1000, height=600)
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canvas.place(x=0, y=0)
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canvas.create_image(0, 0, image=haruna, anchor=tk.NW)
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btn1 = tk.Button(root, text='1,答案読み込み',command=ni, bg=c, fg='black', width=15)
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btn1.place(x=a, y=b)
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root.mainloop()
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```
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