"""计算机软件界面的设计"""
from tkinter import *
from tkinter import messagebox
class Application(Frame):
def __init__(self,master=None):
super().__init__(master)
self.master = master
self.pack()
self.createWidget()
def createWidget(self):
"""通过grid布局实现计算机界面"""
btnText = (("MC","M+","M-","MR"),
("C","±","÷","×"),
(7,8,9,"-"),
(4,5,6,"+"),
(1,2,3,"="),
(0,"."))
Entry(self).grid(row=0,column=0,columnspan=4)
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 + 1, column=cindex, sticky=NSEW)
if __name__ =="__main__":
root = Tk()
root.geometry("200x200+200+300")
app = Application(master=root)
root.mainloop()
老师，第8题如何实现只含一个a和一个e的效果呢？
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