title: String value decode utf-8
body: <p>I want to decode string values ​​to utf-8. But it doesn't change.
  So, here is my code:</p>
  
  <pre><code>self.textEdit_3.append(str(self.new_header).decode("utf-8") + "\n")
  </code></pre>
  
  <p>The result image is here:</p>
  
  <p><img src="https://i.stack.imgur.com/OKX3Y.jpg" alt="enter image description here"></p>
  
  <p>The original output value is:</p>
  
  <pre><code>['matchkey', 'a', 'b', 'd', '안녕'] # 안녕 is Korean Language
  </code></pre>
  
  <p>I changed the default encoding for encoding / decoding with unicode to utf-8 instead of ascii. On the first line I added this code:</p>
  
  <pre><code>import sys
  reload(sys)
  sys.setdefaultencoding('utf-8')
  </code></pre>
  
  <p>Why doesn't the string value change?</p>
  
  <p><a href="https://i.stack.imgur.com/ibG74.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ibG74.jpg" alt="enter image description here"></a></p>