我正在使用 Tkinter，并且在尝试运行代码时不断收到错误消息，有人可以帮忙吗？
from tkinter import *
from tkinter.messagebox import showinfo
def reply(name):
showinfo(title='Reply', message='Hello %s!' % name)
top = Tk()
top.title('Echo')
top.iconbitmap('py-blue-trans-out.ico')
Label(top, text="Enter your name:").pack(side=TOP)
ent = Entry(top)
ent.pack(side=TOP)
btn = Button(top, text="Submit", command=(lambda: reply(ent.get())))
btn.pack(side=LEFT)
top.mainloop()
我不断收到此错误消息：
Traceback (most recent call last):
File "C:\Users\User\Desktop\manage\tkinter103.py", line 9, in <module>
top.iconbitmap('py-blue-trans-out.ico')
File "C:\Users\User\AppData\Local\Programs\Python\Python37\lib\tkinter\__init__.py", line 1871, in wm_iconbitmap
return self.tk.call('wm', 'iconbitmap', self._w, bitmap)
_tkinter.TclError: bitmap "py-blue-trans-out.ico" not defined