title: CSV file not found
body: <p>I am trying to read a CSV file using python for Data Science, But received an error "ail-length-km-at-end-of-year not found."</p>
  
  <p>I have tried moving my file directly to D drive so there wont be any mistakes in me writing the path director. i have tried with another test file, it works.</p>
  
  <pre><code>title = "Length of rails"
  titlelen = len(title)
  print("{:*^{titlelen}}".format(title, titlelen=titlelen+6))
  print()
  
  data = np.genfromtxt('d:\rail-length-km-at-end-of-year',
                       skip_header=1,
                       dtype=[('year','U10'),('rail_type','U50'), 
  ('length','i8')], delimiter=",",
                       missing_values=['na','-'],filling_values=[0])
  
  x_public = data[data['rail_type']=='public sector']['year']
  y_public = data[data['rail_type']=='public sector']['length']
  
  x_private = data[data['rail_type']=='Private Sector']['year']
  y_private = data[data['rail_type']=='Private Sector']['length']
  
  fig = plt.figure()
  ax1 = fig.add_subplot(111)
  
  
  ax1.plot(x_public, y_public, c='b',  label='Public Sector')
  ax1.plot(x_private,y_private, c='r', label='Private Sector')
  plt.ylabel('rail length')
  plt.legend(loc='upper left');
  
  plt.show()
  </code></pre>
  
  <p>Python doesn't recognize the file destination</p>