title: Break very long lines with access to deeply nested dictionaries
body: <p>I access a deeply nested dictionary and want to break very long lines properly. Let's assume I have this and want to break the line to conform with <a href="https://www.python.org/dev/peps/pep-0008/" rel="nofollow noreferrer">PEP8</a>. (The actual line is of course longer, this is just an example.)</p>
  
  <pre><code>some_dict['foo']['bar']['baz'] = 1
  </code></pre>
  
  <p>How would you break the line, assuming the whole</p>
  
  <pre><code>some_dict['foo']['bar']['baz']
  </code></pre>
  
  <p>does not fit on one line anymore? There are a lot of examples for breaking long lines, but I couldn't find one for this dictionary access based question.</p>
  
  <p><strong>Update:</strong> Please note that I want to <strong>assign</strong> something to that dictionary. The proposed duplicate only talks about getting a value from that kind of dictionary.</p>