title: Python pandas NameError: StringIO is not defined
body: <p>I am unable to read data in Pandas:
  Input:</p>
  
  <pre><code>import pandas as pd
  
  data = 'a,b,c\n1,2,3\n4,5,6'
  
  pd.read_csv(StringIO(data),skipinitialspace=True)
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>NameError:name 'StringIO' is not defined
  </code></pre>
  
  <p>Please let me know why the error occurred and also let me know what to import.</p>