title: Read specific columns with pandas or other python module
body: <p>I have a csv file from this <a href="http://www.exoplanet.eu/catalog/?f=%22radial%22+IN+detection+OR+%22astrometry%22+IN+detection+OR+%22transit%22+IN+detection">webpage</a>.
  I want to read some of the columns in the downloaded file (the csv version can be downloaded in the upper right corner).</p>
  
  <p>Let's say I want 2 columns:</p>
  
  <ul>
  <li>59 which in the header is <code>star_name</code></li>
  <li>60 which in the header is <code>ra</code>.</li>
  </ul>
  
  <p>However, for some reason the authors of the webpage sometimes decide to move the columns around.</p>
  
  <p>In the end I want something like this, keeping in mind that values can be missing.</p>
  
  <pre><code>data = #read data in a clever way
  names = data['star_name']
  ras = data['ra']
  </code></pre>
  
  <p>This will prevent my program to malfunction when the columns are changed again in the future, if they keep the name correct.</p>
  
  <p>Until now I have tried various ways using the <code>csv</code> module and resently the <code>pandas</code> module. Both without any luck.</p>
  
  <p>EDIT (added two lines + the header of my datafile. Sorry, but it's extremely long.)</p>
  
  <pre><code># name, mass, mass_error_min, mass_error_max, radius, radius_error_min, radius_error_max, orbital_period, orbital_period_err_min, orbital_period_err_max, semi_major_axis, semi_major_axis_error_min, semi_major_axis_error_max, eccentricity, eccentricity_error_min, eccentricity_error_max, angular_distance, inclination, inclination_error_min, inclination_error_max, tzero_tr, tzero_tr_error_min, tzero_tr_error_max, tzero_tr_sec, tzero_tr_sec_error_min, tzero_tr_sec_error_max, lambda_angle, lambda_angle_error_min, lambda_angle_error_max, impact_parameter, impact_parameter_error_min, impact_parameter_error_max, tzero_vr, tzero_vr_error_min, tzero_vr_error_max, K, K_error_min, K_error_max, temp_calculated, temp_measured, hot_point_lon, albedo, albedo_error_min, albedo_error_max, log_g, publication_status, discovered, updated, omega, omega_error_min, omega_error_max, tperi, tperi_error_min, tperi_error_max, detection_type, mass_detection_type, radius_detection_type, alternate_names, molecules, star_name, ra, dec, mag_v, mag_i, mag_j, mag_h, mag_k, star_distance, star_metallicity, star_mass, star_radius, star_sp_type, star_age, star_teff, star_detected_disc, star_magnetic_field
  11 Com b,19.4,1.5,1.5,,,,326.03,0.32,0.32,1.29,0.05,0.05,0.231,0.005,0.005,0.011664,,,,,,,,,,,,,,,,,,,,,,,,,,,,,1,2008,2011-12-23,94.8,1.5,1.5,2452899.6,1.6,1.6,Radial Velocity,,,,,11 Com,185.1791667,17.7927778,4.74,,,,,110.6,-0.35,2.7,19.0,G8 III,,4742.0,,
  11 UMi b,10.5,2.47,2.47,,,,516.22,3.25,3.25,1.54,0.07,0.07,0.08,0.03,0.03,0.012887,,,,,,,,,,,,,,,,,,,,,,,,,,,,,1,2009,2009-08-13,117.63,21.06,21.06,2452861.05,2.06,2.06,Radial Velocity,,,,,11 UMi,229.275,71.8238889,5.02,,,,,119.5,0.04,1.8,24.08,K4III,1.56,4340.0,,
  </code></pre>