刚学python不久，就会点基础语法，勉强写出了这计算器。。。
代码：
from tkinterimport *
cal = Tk()
cal.title('MyCalculator')
cal.resizable(0,0)
display = Text(cal,width=50,height=3)
display.grid(row=0,columnspan=4)
def call(x):
display.insert(INSERT, x)
def remove():
display.delete(0.0, END)
def calculation():
content = display.get(0.0, END)
try:
result =eval(content)
except BaseException as e:
display.delete(0.0, END)
display.insert(END,'ERROR')
display.insert(END,'\n')
display.insert(END, result)
btn_1 = Button(cal,text='1',command=lambda: call(1))
btn_1.grid(row=1,column=0,sticky=W+E+S+N)
btn_2 = Button(cal,text='2',command=lambda: call(2))
btn_2.grid(row=1,column=1,sticky=W+E+S+N)
btn_3 = Button(cal,text='3',command=lambda: call(3))
btn_3.grid(row=1,column=2,sticky=W+E+S+N)
btn_add = Button(cal,text='+',command=lambda: call('+'))
btn_add.grid(row=1,column=3,sticky=W+E+S+N)
btn_4 = Button(cal,text='4',command=lambda: call(4))
btn_4.grid(row=2,column=0,sticky=W+E+S+N)
btn_5 = Button(cal,text='5',command=lambda: call(5))
btn_5.grid(row=2,column=1,sticky=W+E+S+N)
btn_6 = Button(cal,text='6',command=lambda: call(6))
btn_6.grid(row=2,column=2,sticky=W+E+S+N)
btn_sub = Button(cal,text='-',command=lambda: call('-'))
btn_sub.grid(row=2,column=3,sticky=W+E+S+N)
btn_7 = Button(cal,text='7',command=lambda: call(7))
btn_7.grid(row=3,column=0,sticky=W+E+S+N)
btn_8 = Button(cal,text='8',command=lambda: call(8))
btn_8.grid(row=3,column=1,sticky=W+E+S+N)
btn_9 = Button(cal,text='9',command=lambda: call(9))
btn_9.grid(row=3,column=2,sticky=W+E+S+N)
btn_mul = Button(cal,text='*',command=lambda: call('*'))
btn_mul.grid(row=3,column=3,sticky=W+E+S+N)
btn_clear = Button(cal,text='clear',command=lambda: remove())
btn_clear.grid(row=4,column=0,sticky=W+E+S+N)
btn_0 = Button(cal,text='0',command=lambda: call(0))
btn_0.grid(row=4,column=1,sticky=W+E+S+N)
btn_equal = Button(cal,text='=',command=lambda: calculation())
btn_equal.grid(row=4,column=2,sticky=W+E+S+N)
btn_div = Button(cal,text='/',command=lambda: call('/'))
btn_div.grid(row=4,column=3,sticky=W+E+S+N)
cal.mainloop()
截图
