TclError：无法识别图像文件“background.png”中的数据

Question

我最近切换到了Python 2.7（来自3.4），而且我在使用Tkinter Photoimage类读取.png文件时遇到了麻烦。我说：

background = "background.png"
photo = tk.PhotoImage(file=background)

但是我收到了这个错误：

Traceback (most recent call last):
  File "main.py", line 36, in <module>
    photo = tk.PhotoImage(file=background)
  File "c:\Python27\lib\lib-tk\Tkinter.py", line 3323, in __init__
    Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "c:\Python27\lib\lib-tk\Tkinter.py", line 3279, in __init__
    self.tk.call(('image', 'create', imgtype, name,) + options)
_tkinter.TclError: couldn't recognize data in image file "background.png"

Answer 1

img = ImageTk.PhotoImage(Image.open(background))