title: Error in SqlContext import and parallelize Pyspark
body: <pre><code>line = "Hello, world"
  sc.parallelize(list(line)).collect()
  </code></pre>
  
  <p>I obtain the following error</p>
  
  <p><code>TypeError: parallelize() missing 1 required positional argument: 'c'</code></p>
  
  <p>I also have an other issue when creating a dataframe from a list of strings with only one column:</p>
  
  <pre><code>from pyspark.sql.types import *
  from pyspark.sql import SQLContext
  sqlContext = SQLContext(sc)
  schema = StructType([StructField("name", StringType(), True)])
  df3 = sqlContext.createDataFrame(fuzzymatchIntro, schema)
  df3.printSchema()
  </code></pre>
  
  <p>I obtain the following error: </p>
  
  <pre><code>----&gt; 3 sqlContext = SQLContext(sc)
  AttributeError: type object 'SparkContext' has no attribute '_jsc'
  </code></pre>
  
  <p>Thank you in advance</p>