title: A-star search in numpy or python
body: <p>i tried searching stackoverflow for the tags <code>[a-star] [and] [python]</code> and <code>[a-star] [and] [numpy]</code>, but nothing. i also googled it but whether due to the tokenizing or its existence, i got nothing.</p>
  
  <p>it's not much harder than your coding-interview tree traversals to implement. but, it would be nice to have a correct efficient implementation for everyone.</p>
  
  <p>does numpy have A*?</p>