我有这个代码:
#!/usr/bin/python
-*- coding: utf-8 -*-
from Tkinter import *
from ttk import Frame, Button, Style
class Example(Frame):
def __init__(self, parent):
Frame.__init__(self, parent)
self.parent = parent
self.initUI()
def initUI(self):
self.parent.title("Multiplication")
self.style = Style()
self.style.theme_use("clam")
self.pack(fill=BOTH, expand=1)
E1 = Entry(bd =5)
E1.place(x=0, y=0)
E2 = Entry(bd=5)
E2.place(x=125, y=0)
E3 = Entry(bd=5)
E3.place(x=62.5, y=25)
calcButton = Button(self, text="Button", command=calcButton.calculate)
calcButton.place(x=50, y=50)
def calculate(calcButton):
a = E1.get()
b = E2.get()
c = E3.get()
def main():
root = Tk()
root.geometry("250x150+300+300")
app = Example(root)
root.mainloop()
if __name__ == '__main__':
main()
我得到了一个错误:
Traceback (most recent call last):
File "E:\Python27\tkinter", line 48, in <module>
main()
File "E:\Python27\tkinter", line 43, in main
app = Example(root)
File "E:\Python27\tkinter", line 15, in __init__
self.initUI()
File "E:\Python27\tkinter", line 31, in initUI
calcButton = Button(self, text="Button", command=calcButton.calculate)
UnboundLocalError: local variable 'calcButton' referenced before assignment
很抱歉缩进不正确,这个代码粘贴很困难。 我看过重复的问题,也试过他们说的话,但都没用。 感谢任何帮助! 谢谢。在
在这一行中,您使用的是:
其中,
calcButton.calculate
被调用以将其分配给calcButton
,但它尚未声明。在这可能是:
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