title: Error when trying to use module load_workbook from openpyxl
body: <p>I'm attempting to open an xlsx-file using load_workbook from the module <a href="https://openpyxl.readthedocs.io/en/default/" rel="nofollow noreferrer">openpyxl</a>. The code I have is:</p>
  
  <pre><code>import os
  from openpyxl import load_workbook
  
  def edit_workbook():
      path = r'C:\123 ABC\Excel documents'
      filename = 'filename.xlsx'
  
      os.path.join(path, filename)
      workbook = load_workbook(os.path.join(path, filename))
  
      ## Error is on the line above.
  </code></pre>
  
  <p>The complete error message I get is:</p>
  
  <pre><code>Traceback (most recent call last):
  
    File "&lt;ipython-input-12-22dfdfc4e5e1&gt;", line 1, in &lt;module&gt;
      workbook = load_workbook(os.path.join(path, filename))
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\reader\excel.py", line 214, in load_workbook
      apply_stylesheet(archive, wb) # bind styles to workbook
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\styles\stylesheet.py", line 176, in apply_stylesheet
      stylesheet = Stylesheet.from_tree(node)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\styles\stylesheet.py", line 99, in from_tree
      return super(Stylesheet, cls).from_tree(node)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\serialisable.py", line 79, in from_tree
      obj = desc.expected_type.from_tree(el)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\serialisable.py", line 79, in from_tree
      obj = desc.expected_type.from_tree(el)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\serialisable.py", line 79, in from_tree
      obj = desc.expected_type.from_tree(el)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\serialisable.py", line 92, in from_tree
      return cls(**attrib)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\styles\table.py", line 37, in __init__
      self.dxfId = dxfId
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\base.py", line 69, in __set__
      value = _convert(self.expected_type, value)
  
    File "C:\Users\Stewie\Anaconda3\lib\site-packages\openpyxl\descriptors\base.py", line 59, in _convert
      raise TypeError('expected ' + str(expected_type))
  
  TypeError: expected &lt;class 'int'&gt;
  </code></pre>
  
  <p>Anyone know what this can be?</p>