title: how to paste a rotate image without cropping sides
body: <p><a href="https://i.stack.imgur.com/RmmwB.jpg" rel="nofollow noreferrer">this is the original back image</a>
  <a href="https://i.stack.imgur.com/0w1xs.jpg" rel="nofollow noreferrer">this is the original front image</a>
  this is my code:</p>
  
  <pre><code>from PIL import Image
  front=Image.open('/users/apple/Desktop/TMP.jpeg')
  back=Image.open('/Users/apple/Desktop/原始图片/084.jpeg')
  front=front.rotate(100,expand=True)
  back.paste(front,(100,100))
  back
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/WynCv.jpg" rel="nofollow noreferrer">this is what i get</a>.
  i want a clean paste without cropping sides.
  can somebody help me ,thanks.</p>