title: How can I extract credit card substring from a string using python
body: <p>I am new to python and I hope someone can help me with this. I need to extract credit card numbers from a string. e.g</p>
  
  <p>"My credit card number is 1234-2312-2312-2312" or
  "My Credict card number is 1234 1234 1832 1234"</p>
  
  <p>Anyone knows how I can do it?</p>