title: delimiter of tab '\t' of csv.writer in python
body: <p>I want to write the dict into csv as this form:</p>
  
  <pre><code>(column1)   (column2)
    aaa           1     
    bbb           2
  </code></pre>
  
  <p>but when I use the '\t' as the delimiter in the following code:</p>
  
  <pre><code>import csv
  
  csv_filename = "test.csv"
  dict = {'aaa': 1, 'bbb': 2} 
  with open(csv_filename, 'wb') as f:
      writer = csv.writer(f, delimiter='\t')
      for key, value in dict.items():
          writer.writerow([key, value])
  </code></pre>
  
  <p>I could not get the desired ouput, instead the created csv will be like</p>
  
  <pre><code>(column1)   (column2)
    aaa1
    bbb2
  </code></pre>