import tkinter
import serial
data= serial.Serial('com3','9600')
def zero():
 data.write(b'1')
def fortyFive():
 data.write(b'2')
def ninety():
 data.write(b'3')
def OneHundredAndThirtyFive():
 data.write(b'4')
def OneHundredAndNinety():
 data.write(b'5')
servo=tkinter.Tk()
Button=tkinter.Button
text=tkinter.Text
zero=Button(servo, text="0 ", command=zero,height=8, width=16  )
fortyFive=Button(servo, text="45", command=fortyFive,height=8, width=16)
ninety=Button(servo, text="90", command=ninety,height=8, width=16)
OneHundredAndThirtyFive=Button(servo, text="135 ", command=OneHundredAndThirtyFive,height=8, width=16  )
OneHundredAndNinety=Button(servo, text="180 ", command=OneHundredAndNinety,height=8, width=16  )
zero.pack(side=tkinter.RIGHT)
fortyFive.pack(side=tkinter.RIGHT)
ninety.pack(side=tkinter.RIGHT)
OneHundredAndThirtyFive.pack(side=tkinter.RIGHT)
OneHundredAndNinety.pack(side=tkinter.RIGHT)
servo.mainloop()