docs: def getFieldInfo(fieldnum):
      """Returns a dictionary containing the metadata of a K2 Campaign field.
  
      Raises a ValueError if the field number is unknown.
  
      Parameters
      ----------
      fieldnum : int
          Campaign field number (e.g. 0, 1, 2, ...)
  
      Returns
      -------
      field : dict
          The dictionary contains the keys
          'ra', 'dec', 'roll' (floats in decimal degrees),
          'start', 'stop', (strings in YYYY-MM-DD format)
          and 'comments' (free text).
      """
      try:
          info = _getCampaignDict()["c{0}".format(fieldnum)]
          # Print warning messages if necessary
          if "preliminary" in info and info["preliminary"] == "True":
              logger.warning("Warning: the position of field {0} is preliminary. "
                             "Do not use this position for your final "
                             "target selection!".format(fieldnum))
          return info
      except KeyError:
          raise ValueError("Field {0} not set in this version "
                           "of the code".format(fieldnum))