title: Read lines starting with numbers
body: <p>How can I only read lines in a file that start with numbers in python i.e</p>
  
  <pre><code>Hello World &lt;--ignore
  Lovely day
  blah43 
  blah
  1234 &lt;--read
  blah12 &lt;--ignore
  blah 
  3124 &lt;--read
  Not matter how many words there are &lt;--ignore
  blah 
  0832 8423984 234892304 8239048324 8023948&lt;--read
  blah132 &lt;--ignore
  </code></pre>