title: Convert Row into List(String) in PySpark
body: <p>I have data in Row tuple format - </p>
  
  <pre><code>Row(Sentence=u'When, for the first time I realized the meaning of death.')
  </code></pre>
  
  <p>I want to convert it into String format like this - </p>
  
  <pre><code>(u'When, for the first time I realized the meaning of death.')
  </code></pre>
  
  <p>I tried like this (Suppose 'a' is having data in Row tupple)-</p>
  
  <pre><code>b = sc.parallelize(a)
  b = b.map(lambda line: tuple([str(x) for x in line]))
  print(b.take(4))
  </code></pre>
  
  <p>But I am getting result something like this - </p>
  
  <pre><code>[('W', 'h', 'e', 'n', ',', ' ', 'f', 'o', 'r', ' ', 't', 'h', 'e', ' ', 'f', 'i', 'r', 's', 't', ' ', 't', 'i', 'm', 'e', ' ', 'I', ' ', 'r', 'e', 'a', 'l', 'i', 'z', 'e', 'd', ' ', 't', 'h', 'e', ' ', 'm', 'e', 'a', 'n', 'i', 'n', 'g', ' ', 'o', 'f', ' ', 'd', 'e', 'a', 't', 'h', '.')]
  </code></pre>
  
  <p>Do anybody know what I am doing wrong here?</p>