servo-input.py

from gpiozero import  Servo, AngularServo
from time import sleep

#servo = Servo(21)
servo = AngularServo(21, min_angle=0, max_angle=180, min_pulse_width=0.0006, max_pulse_width=0.0024)
while True:
        """
        num = input("Enter a number between -1 and 1")
        num = float(num)
        if num <= 1 and num >= -1:
                servo.value = num
                sleep(1)
        else:
                print("That's not allowed")
        """
        v = input("enter a number between 0 and 180 \n")
        v = float(v)
        print(type(v))
        print(servo.angle)
        if v<=180 and v >= 0:
                servo.angle = v