title: How can I draw a point with Canvas in Tkinter?
body: <p>I want to draw a point in Tkinter,Now I'm using <code>Canvas</code> to make it,but I didn't find such method to draw a point in <code>Canvas</code> class.<code>Canvas</code> provides a method called <code>crete_line(x1,y1,x2,y2)</code>,so i tried to set <code>x1=x2,y1=y2</code> to draw a point, but it doesn't work.</p>
  
  <p>So anyone can tell me how to make it,it will be better if use <code>Canvas</code> can make it,other solution will be also accepted.Thanks!</p>