Python button选取本地图片并显示的实例

从本地文件夹中选取一张图片并在canvas上显示

from tkinter import *
from tkinter import filedialog
from pil import image, imagetk

if __name__ == "__main__":
  root = tk()

  #setting up a tkinter canvas with scrollbars
  frame = frame(root, bd=2, relief=sunken)
  frame.grid_rowconfigure(0, weight=1)
  frame.grid_columnconfigure(0, weight=1)
  xscroll = scrollbar(frame, orient=horizontal)
  xscroll.grid(row=1, column=0, sticky=e+w)
  yscroll = scrollbar(frame)
  yscroll.grid(row=0, column=1, sticky=n+s)
  canvas = canvas(frame, bd=0, xscrollcommand=xscroll.set, yscrollcommand=yscroll.set)
  canvas.grid(row=0, column=0, sticky=n+s+e+w)
  xscroll.config(command=canvas.xview)
  yscroll.config(command=canvas.yview)
  frame.pack(fill=both,expand=1)


  #function to be called when mouse is clicked
  def printcoords():
    file = filedialog.askopenfilename(parent=root, initialdir="c:/",title='choose an image.')
    filename = imagetk.photoimage(image.open(file))
    canvas.image = filename # <--- keep reference of your image
    canvas.create_image(0,0,anchor='nw',image=filename)

  button(root,text='choose',command=printcoords).pack()
  root.mainloop()

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