Python RobotPy problem

import wpilib #Library for robot#
from __future__ import division #Needed for the math#


class MyRobot(wpilib.IterativeRobot):

    def robotInit(self):
        #Set up for pins 8 and 9 on RIO#
        self.motor1=wpilib.Jaguar(8)
        self.slide_motor=wpilib.Jaguar(9)
        #Sets up motor1 and motor2 to drive#
        #Using joystick 1(Works best with xbox controller)#
        self.stick=wpilib.Joystick(1)
        #Calls function for human controlled robot#
        self.teleopPeriodic()


    def teleopPeriodic(self):

        while self.isOperatorControl() and self.isEnabled(): #https://github.com/robotpy/robotpy-wpilib/blob/master/examples/sample/robot.py

            #Get the x and y axis from controller#
            controller=self.stick.getY()
            x=self.stick.getX()

            #Controller is the y#
            #Depending on value, it will determine the curve#

            x=(x/255)*100
            controller=(controller/255)*100

            if controller <=50:
                output=controller*(2/5)
            elif controller >50 and controller <=70:
                output=controller*(32/70)
            elif controller >70 and controller<=85:
                output=controller*(65/85)
            elif controller >85 and controller<=90:
                output=controller*(75/90)
            elif controller >90 and controller<=95:
                output=controller*(90/95)
            elif controller >95 and controller<=100:
                output=controller
            else:
                pass

            #x1 is the output of x#

            if x <=50:
                x1=x*(2/5)
            elif x >50 and x<=70:
                x1=x*(32/70)
            elif x >70 and x<=85:
                x1=x*(65/85)
            elif x >85 and x<=90:
                x1=x*(75/90)
            elif x >90 and x<=95:
                x1=x*(90/95)
            elif x >95 and x<=100:
                x1=x
            else:
                pass

            #drives the robot#
            # Might need this line later... self.robot_drive.aracadeDrive(output,x1)
            self.slide_motor.set(x1)
            self.motor.set(output)


#Runs the code#
if __name__=="__main__":
    wpilib.run(MyRobot)