title: Python docx paragraph in textbox
body: <p>Is there any way to access and manipulate text in an existing docx document in a textbox with <code>python-docx</code>?</p>
  
  <p>I tried to find a keyword in all paragraphs in a document by iteration:</p>
  
  <pre><code>doc = Document('test.docx')
  
  for paragraph in doc.paragraphs:
      if '&lt;DATE&gt;' in paragraph.text:
          print('found date: ', paragraph.text)
  </code></pre>
  
  <p>It is found if placed in normal text, but not inside a textbox.</p>