Is there a way to check a radius around a random point in order for random points to be separate from each other

I'm currently creating a drawing project, where I use random to create random star points in the sky. I currently have the ability for two points to not be the same, but I would like to find a way to make it so they wouldn't land in a x radius circle. Is there any way in python to complete this

import turtle as t, random as r
screen=t.Screen()
screen.bgcolor("#3A3B3C")
t.speed(1)


def randomStars(y, num):
  t.penup()
  t.pensize(2)
  t.color("white")
  locations = []
  
  for x in range(num):
    repeat = True
    t.penup()
    t.seth(90)
    y_pos = starLocationY(y)
    x = starLocationX()
    while repeat == True:
      if [x,y_pos] in locations:
          y_pos = starLocationY(y)
          x = starLocationX()
      else:
        locations.append([x,y_pos])
        repeat = False
    t.goto(x,y_pos)
    t.pendown()
    t.seth(60)
    t.fd(2)
    t.fd(-2)
    t.seth(-60)
    t.fd(2)
    t.fd(-2)
    t.seth(240)
    t.fd(2)
    t.fd(-2)
    t.seth(120)
    t.fd(2)
    t.fd(-2)

randomStars(85,30)

p.s: I'm using trinket for the project, as required by the class, so the modules are limited

link to trinket:https://trinket.io/python/9776ba1b8a