docs: def encode(obj):
      r"""Encode all unicode/str objects in a dataframe in the encoding indicated (as a fun attribute)
  
      similar to to_ascii, but doesn't return a None, even when it fails.
      >>> encode(u'Is 2013 a year or a code point for "\u2013"?')
      b'Is 2013 a year or a code point for "\xe2\x80\x93"?'
      >>> print(u'Is 2013 a year or a code point for "\u2013"?')
      Is 2013 a year or a code point for "–"?
      """
      try:
          return obj.encode(encode.encoding)
      except AttributeError:
          pass
      except UnicodeDecodeError:
          logger.warning('Problem with byte sequence of type {}.'.format(type(obj)))
          # TODO: Check PG for the proper encoding and fix Django ORM settings so that unicode can be UTF-8 encoded!
          return str('').join([c for c in obj if c < MAX_CHR])
      # TODO: encode sequences of strings and dataframes of strings
      return obj