title: Recursively move all files on subdirectories to another directory in Python
body: <p>The title explains what I am after. Note that the sub directories won't contain any directories <em><strong>only</strong></em>  <em><strong>files</strong></em> (*.JPG). Essentially, just moving everything up one level in the file tree.</p>
  <p>For example, from <code> ~/someDir/folder1/*</code> , <code>~/someDir/folder2/*</code> , ... , <code>~/someDir/folderN/*</code>. I want all of the contents of the sub directories brought up to <code>~/someDir/</code>.</p>