import tkinter class niubijisuanq: def __init__(self): self.root = tkinter.Tk() self.root.title('某某的计算器') self.root.minsize(300, 420) self.pinmu = tkinter.StringVar() self.pinmu.set('0') #创建一个列表 self.dbg = [] #创建个变量 self.ama = False #面板调用 self.minaban() self.root.mainloop()  #按键 def anjian(self,num): if self.ama == True: self.pinmu.set('0') self.ama = False if self.pinmu.get() == '0': self.pinmu.set(num) if self.pinmu.get() =='.': self.pinmu.set('0'+num) else: if self.pinmu.get().count('.')==0: self.pinmu.set(self.pinmu.get()+num) elif num != '.': self.pinmu.set(self.pinmu.get()+num)  #符号 def fuhao(self,xin): xinzhi = self.pinmu.get() self.dbg.append(xinzhi) self.dbg.append(xin) print(self.dbg) self.ama = True  #等于 def denghao(self): try: xinzhi = self.pinmu.get() self.dbg.append(xinzhi) res = eval(''.join(self.dbg)) print(res) self.pinmu.set(round(res,8)) self.dbg.clear() except ZeroDivisionError : self.pinmu.set('数学是体育是教的')  #删除 def delete(self): if self.pinmu.get() == '' or self.pinmu.get() == '0': self.pinmu.set('0') return chang = len(self.pinmu.get()) if chang >1: changdu = self.pinmu.get() changdu = changdu[0:chang-1] self.pinmu.set(changdu) else: self.pinmu.set('0')  #清空 def qingk(self): self.dbg = [] self.pinmu.set('0') self.ama =True  #正负 def zhengfu(self): huoquzhi = self.pinmu.get() if huoquzhi[0] == '-': self.pinmu.set(huoquzhi[1:]) elif huoquzhi[0] != '-' and huoquzhi[0] != '0' : self.pinmu.set('-'+huoquzhi) else: huoquzhi.startswith('0.') self.pinmu.set('-'+huoquzhi) def minaban(self): # 屏幕显示 gj = tkinter.Label(self.root,textvariable =self.pinmu , bg='red', bd=5, anchor='se', font=('宋体', 30)) gj.place(x=10, y=5, width=280, height=60) gj1 = tkinter.Button(text='1',command = lambda :self.anjian('1')) gj1.place(x=10, y=140, width=60, height=60) gj2 = tkinter.Button(text='2', command= lambda :self.anjian('2')) gj2.place(x=80, y=140, width=60, height=60) gj3 = tkinter.Button(text='3', command=lambda :self.anjian('3')) gj3.place(x=150, y=140, width=60, height=60) gj4 = tkinter.Button(text='4', command= lambda :self.anjian('4')) gj4.place(x=10, y=210, width=60, height=60) gj5 = tkinter.Button(text='5', command= lambda :self.anjian('5')) gj5.place(x=80, y=210, width=60, height=60) gj6 = tkinter.Button(text='6', command= lambda :self.anjian('6')) gj6.place(x=150, y=210, width=60, height=60) gj7 = tkinter.Button(text='7', command= lambda :self.anjian('7')) gj7.place(x=10, y=280, width=60, height=60) gj8 = tkinter.Button(text='8', command= lambda :self.anjian('8')) gj8.place(x=80, y=280, width=60, height=60) gj9 = tkinter.Button(text='9', command= lambda :self.anjian('9')) gj9.place(x=150, y=280, width=60, height=60) gj0 = tkinter.Button(text='0', command= lambda :self.anjian('0')) gj0.place(x=10, y=350, width=130, height=60) gjd = tkinter.Button(text='.', command= lambda :self.anjian('.')) gjd.place(x=150, y=350, width=60, height=60) gjjia = tkinter.Button(text='-', command= lambda :self.fuhao('-') ) gjjia.place(x=220, y=140, width=60, height=60) gjjia1 = tkinter.Button(text='*', command= lambda :self.fuhao('*')) gjjia1.place(x=220, y=210, width=60, height=60) gjcheng = tkinter.Button(text='/', command= lambda :self.fuhao('/')) gjcheng.place(x=220, y=280, width=60, height=60) gjchu1 = tkinter.Button(text='=', command= self.denghao) gjchu1.place(x=220, y=350, width=60, height=60) gjchu2 = tkinter.Button(text='←', command=self.delete) gjchu2.place(x=10, y=70, width=60, height=60) gjchu3 = tkinter.Button(text='C', command=self.qingk) gjchu3.place(x=80, y=70, width=60, height=60) gjchu4 = tkinter.Button(text='±', command=self.zhengfu) gjchu4.place(x=150, y=70, width=60, height=60) gjchu5 = tkinter.Button(text='+', command= lambda :self.fuhao('+')) gjchu5.place(x=220, y=70, width=60, height=60) gj = niubijisuanq()