title: Read charts from .xlsx file in Python
body: <p>I am using <a href="https://openpyxl.readthedocs.io/en/stable/index.html" rel="nofollow noreferrer"><code>openpyxl</code></a> library to read <a href="https://en.wikipedia.org/wiki/Office_Open_XML" rel="nofollow noreferrer"><code>.xlsx</code></a> files in Python. I need to read some information (title, series names etc) about charts embedded in worksheets. Documentation mentions only <a href="https://openpyxl.readthedocs.io/en/stable/charts/introduction.html" rel="nofollow noreferrer">creating new charts</a>, and reading existing charts is nowhere mentioned.</p>
  
  <pre><code>#!/usr/bin/env python
  
  from openpyxl import load_workbook
  wb = load_workbook("charts.xlsx")
  for sheet in wb:
      # wb.???
  </code></pre>