Python Code

Hallo, habe vor einiger Zeit einen Taschenrechner erstellt über folgenden code. Leider passiet beim anklicken der Zeichen nichts, sie lassen sich nicht wiedergeben. Vielleicht könnt ihr mir weiter helfen.

from tkinter import *
from math import *



def calculate(event):
      gleichung = t.get()
      t.delete(0,End)
      try:
            t.insert(0, eval(gleichung))
      except:
            t.insert(0, "Invalid syntax")



top = Tk()

t = Entry(top)

t.grid(row=0,columnspan=3)

b1 = Button(top,text="1")
b1.grid(row=1,column=0)
b2 = Button(top,text="2")
b2.grid(row=1,column=1)
b3 = Button(top,text="3")
b3.grid(row=1,column=2)
b4 = Button(top,text="4")
b4.grid(row=2,column=0)
b5 = Button(top,text="5")
b5.grid(row=2,column=1)
b6 = Button(top,text="6")
b6.grid(row=2,column=2)
b7 = Button(top,text="7")
b7.grid(row=3,column=0)
b8 = Button(top,text="8")
b8.grid(row=3,column=1)
b9 = Button(top,text="9")
b9.grid(row=3,column=2)
b0 = Button(top,text="0")
b0.grid(row=4,column=1)
bp = Button(top,text="+")
bp.grid(row=0,column=3)
bm = Button(top,text="-")
bm.grid(row=1,column=3)
bmu = Button(top,text="*")
bmu.grid(row=2,column=3)
bd = Button(top, text="/")
bd.grid(row=3,column=3)
be = Button(top,text="=")
be.grid(row=4,column=3)
bdel = Button(top,text="DEL")
bdel.grid(row=4,column=2)

b1.bind("<Button-1>"), lambda x: t.insert(END,"1")
b2.bind("<Button-1>"), lambda x: t.insert(END,"2")
b3.bind("<Button-1>"), lambda x: t.insert(END,"3")
b4.bind("<Button-1>"), lambda x: t.insert(END,"4")
b5.bind("<Button-1>"), lambda x: t.insert(END,"5")
b6.bind("<Button-1>"), lambda x: t.insert(END,"6")
b7.bind("<Button-1>"), lambda x: t.insert(END,"7")
b8.bind("<Button-1>"), lambda x: t.insert(END,"8")
b9.bind("<Button-1>"), lambda x: t.insert(END,"9")
b0.bind("<Button-1>"), lambda x: t.insert(END,"0")
bp.bind("<Button-1>"), lambda x: t.insert(END,"+")
bm.bind("<Button-1>"), lambda x: t.insert(END,"-")
bmu.bind("<Button-1>"), lambda x: t.insert(END,"*")
bd.bind("<Button-1>"), lambda x: t.insert(END,"/")
be.bind("<Button-1>", calculate)
bdel.bind("<Button-1>", lambda x: t.delete(0,END))







top.mainloop()