from tkinter import *
from tkinter import messagebox
import random
class Application(Frame):
def __init__(self, master=None):
super().__init__(master)
self.master = master
self.pack()
self.createWidget()
def createWidget(self):
btnText = (("MC", "M+", "M-", "MR"),
("C", "±", "÷", "x"),
(7, 8, 9, "-"),
(4, 5, 6, "+"),
(1, 2, 3, "="),
(0, "."))
Entry(self).grid(row=0,column=0,columnspan=4,pady=10)
for rindex, r in enumerate(btnText):
for cindex, c in enumerate(r):
if c == "=":
Button(self, text=c, width=2)\
.grid(row = rindex+1, column=cindex, rowspan=2, sticky=NSEW)
elif c == 0:
Button(self, text=c, width=2)\
.grid(row=rindex+1, column=cindex, columnspan=2, sticky=NSEW )
elif c == ".":
Button(self, text=c,width=2)\
.grid(row=rindex+1, column=cindex+1, sticky=NSEW)
else:
Button(self, text=c,width=2)\
.grid(row=rindex,column=cindex,sticky=NSEW)
if __name__ == '__main__':
root = Tk()
root.geometry("500x500+200+200")
app = Application(master=root)
root.mainloop()
老师,为什么我运行后,没有文本行,并且 = 这里也是异常
