title: Use glob to find arbitrary length numbers
body: <p>I'm looking for the glob-pattern that find all files containing the pattern <code>myfile_[SomeNumber].txt</code></p>
  
  <p>My naive attempt was </p>
  
  <pre><code>glob.glob("myfile_[0-9]*.txt")
  </code></pre>
  
  <p>but this also find all files on the form <code>myfile_[SomeNumber][AnyStuff].txt</code></p>
  
  <p>This answer shows how to do it for a fixed length, but that not what I want in this case.
  <a href="https://stackoverflow.com/questions/2692706/use-python-glob-to-find-a-folder-that-is-a-14-digit-number">use python glob to find a folder that is a 14 digit number</a></p>