title: What is a good way to visualize common string values from multiple dataframe columns?
body: <p>I have multiple dataframes(one for each city) with 'Name' column that represents organization names from that city. </p>
  
  <p>How can I visualize the names that are common in every 2 cities and the names that are common for all cities so that it would be easy to understand?</p>
  
  <p>Example:</p>
  
  <pre class="lang-py prettyprint-override"><code>  df1            df2
  
    Name           Name       
  'Apollo'        'Kims'
  'MedWorks'      'AIMs'
  'Cradle'        'Apollo'
  'Kims'          'Bronte Co'
  'Collins'       'Cradle'
  </code></pre>
  
  <p>There are more than 10 values(names) common for each city. I am not sure if venn diagrams work with string values but even if they do, it will not fit all the data in a good format. </p>
  
  <p>Tried <a href="https://stackoverflow.com/questions/55717203/plot-actual-set-items-in-python-not-the-number-of-items">this as suggested</a> but I am getting:</p>
  
  <pre><code>TypeError: unsupported operand type(s) for -: 'str' and 'str'
  </code></pre>