python tkinter canvas 显示图片的示例

create_image(position, **options) [#]
Draws an image on the canvas.

position
Image position, given as two coordinates.
**options
Image options.
activeimage=
anchor=
Where to place the image relative to the given position. Default is CENTER.
disabledimage=
image=
The image object. This should be a PhotoImage or BitmapImage, or a compatible object (such as the PIL PhotoImage). The application must keep a reference to the image object.
state=
Item state. One of NORMAL, DISABLED, or HIDDEN.
tags=
A tag to attach to this item, or a tuple containing multiple tags.
Returns:
The item id.

image = Image.open("img.jpg") 
im = ImageTk.PhotoImage(image) 

canvas.create_image(300,50,image = im) 

image = None
im = None

def method():
  global image
  global im
  image = Image.open("img.jpg") 
  im = ImageTk.PhotoImage(image) 
  ...