pyPDF2 nautilus columns modification

[AJBek]

Hi there, I am a recent convert to Linux and really enjoying it so far but I have come across a really annoying problem that is preventing me from moving over fully. I do a lot of work with pdf files and have over 15,000 of them in a folder to work with. I frequently have to do searches and to make things easier I have information stored in the “keywords” metadata section of the pdf. In windows I can view all the pf thumbnails using windows explorer and can also display the pdf tags using a COM program called pdf property extension.

https://coolsoft.altervista.org/en/pdfpropertyextension

I need something similar for linux and thought the nautilus columns python extension for nautilus would do the job for me.

https://www.linuxuprising.com/2019/02/na...adata.html

While it does exactly what I want, in its default form it only displays title and author, not keywords.
I managed to get into the pythons code that controls it and you can see the code here.

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#!/usr/bin/env python # -*- coding: utf-8 -*- # # This file is part of nautilus-columns   # this script can installed to the current user account by running the # following commands:   # sudo apt-get install python-FileManager python-mutagen python-pyexiv2 # python-kaa-metadata   # mkdir ~/.local/share/FileManager-python/extensions/ # cp bsc-v2.py ~/.local/share/FileManager-python/extensions/ # chmod a+x ~/.local/share/FileManager-python/extensions/bsc-v2.py   # alternatively, you can be able to place the script in: # /usr/share/FileManager-python/extensions/   # change log: # geb666: original bsc.py, based on work by Giacomo Bordiga # jmdsdf: version 2 adds extra ID3 and EXIF tag support # jmdsdf: added better error handling for ID3 tags, added mp3 length support, #         distinguished between exif image size and true image size # SabreWolfy: set consistent hh:mm:ss format, fixed bug with no ID3 information #             throwing an unhandled exception # jmdsdf: fixed closing file handles with mpinfo (thanks gueba) # jmdsdf: fixed closing file handles when there's an exception #         (thanks Pitxyoki) # jmdsdf: added video parsing (work based on enbeto, thanks!) # jmdsdf: added FLAC audio parsing through kaa.metadata #         (thanks for the idea l-x-l) # jmdsdf: added trackno, added mkv file support (thanks ENigma885) # jmdsdf: added date/album for flac/video (thanks eldon.t) # jmdsdf: added wav file support thru pyexiv2 # jmdsdf: added sample rate file support thru mutagen and kaa #         (thanks for the idea N'ko) # jmdsdf: fix with tracknumber for FLAC, thanks l-x-l # draxus: support for pdf files # arun (engineerarun@gmail.com): made changes to work with naulitus 3.x # Andrew@webupd8.org: get EXIF support to work with FileManager 3 # Julien Blanc: fix bug caused by missing Exif.Image.Software key # Andreas Schönfelder: show stars as rating   # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program.  If not, see <http://www.gnu.org/licenses/>.   import gi try:     gi.require_version('Nautilus', '3.0')     gi.require_version('GObject', '2.0')     gi.require_version('GExiv2', "0.10") except Exception as e:     print(e)     exit(1) from gi.repository import Nautilus as FileManager from gi.repository import GObject from gi.repository import GExiv2   import urllib # for id3 support from mutagen.easyid3 import EasyID3 from mutagen.mp3 import MPEGInfo # for reading videos. for future improvement, this can also read mp3! import kaa.metadata # for reading image dimensions from PIL import Image # for reading pdf from PyPDF2 import PdfFileReader # locale import sys import os import math import locale import gettext   APP = 'nautilus-columns' ROOTDIR = '/usr/share/' LANGDIR = os.path.join(ROOTDIR, 'locale-langpack')   try:     current_locale, encoding = locale.getdefaultlocale()     language = gettext.translation(APP, LANGDIR, [current_locale])     language.install()     if sys.version_info[0] == 3:         _ = language.gettext     else:         _ = language.ugettext except Exception as e:     print(e)     _ = str     def get_resolution_unit(metadata):     try:         value = metadata.get_tag_string('Exif.Image.ResolutionUnit')     except Exception:         value == -1     if value == '1':         return _('No absolute unit of measurement')     elif value == '2':         return _('Inch')     elif value == '3':         return _('Centimeter')     return _('Unknown')     def get_orientation(metadata):     try:         value = metadata.get_orientation()     except Exception:         value == -1     if value == GExiv2.Orientation.UNSPECIFIED:         return _('Unknown')     elif value == GExiv2.Orientation.NORMAL:         return _('Normal')     elif value == GExiv2.Orientation.HFLIP or\             value == GExiv2.Orientation.VFLIP or\             value == GExiv2.Orientation.ROT_90_HFLIP or\             value == GExiv2.Orientation.ROT_90_VFLIP:         return _('Flipped')     elif value == GExiv2.Orientation.ROT_180:         return _('180º')     elif value == GExiv2.Orientation.ROT_90:         return _('90º')     elif value == GExiv2.Orientation.ROT_270:         return _('270º')     return _('Unknown')     def get_metering_mode(metadata):     try:         value = metadata.get_tag_string('Exif.Photo.MeteringMode')     except Exception:         value = -1     if value == '0':             return _('Unknown')     elif value == '1':             return _('Average')     elif value == '2':             return _('Center weighted average')     elif value == '3':             return _('Spot')     elif value == '4':             return _('Multi spot')     elif value == '5':             return _('Pattern')     elif value == '6':             return _('Partial')     elif value == '255':             return _('other ')     return _('Unknown')     def get_light_source(metadata):     try:         value = metadata.get_tag_string('Exif.Photo.LightSource')     except Exception:         value = -1     if value == '0':             return _('Unknown')     elif value == '1':             return _('Daylight')     elif value == '2':             return _('Fluorescent')     elif value == '3':             return _('Tungsten (incandescent light)')     elif value == '4':             return _('Flash')     elif value == '9':             return _('Fine weather')     elif value == '10':             return _('Cloudy weather')     elif value == '11':             return _('Shade')     elif value == '12':             return _('Daylight fluorescent (D 5700 - 7100K)')     elif value == '13':             return _('Day white fluorescent (N 4600 - 5400K)')     elif value == '14':             return _('Cool white fluorescent (W 3900 - 4500K)')     elif value == '15':             return _('White fluorescent (WW 3200 - 3700K)')     elif value == '17':             return _('Standard light A')     elif value == '18':             return _('Standard light B')     elif value == '19':             return _('Standard light C')     elif value == '20':             return _('D55')     elif value == '21':             return _('D65')     elif value == '22':             return _('D75')     elif value == '23':             return _('D50')     elif value == '24':             return _('ISO studio tungsten')     elif value == '255':             return _('Other light source')     return _('Unknown')     def get_exposure_mode(metadata):     try:         value = metadata.get_tag_string('Exif.Photo.ExposureMode')     except Exception:         value = -1     if value == '0':         return _('Auto exposure')     elif value == '1':         return _('Manual exposure')     elif value == '2':         return _('Auto bracket')     return _('Unknown')     def get_gain_control(metadata):     try:         value = metadata.get_tag_string('Exif.Photo.GainControl')     except Exception:         value = -1     if value == '0':         return _('None')     elif value == '1':         return _('Low Gain Up')     elif value == '2':         return _('High Gain Up')     elif value == '3':         return _('Low Gain Down')     elif value == '4':         return _('High Gain Down')     return _('Unknown')     def get_flash(metadata):     try:         value = metadata.get_tag_string('Exif.Photo.Flash')     except Exception:         value = -1     if value == '0':         return _('Flash did not fire')     elif value == '1':         return _('Flash fired')     elif value == '2':         return _('Strobe return light detected')     elif value == '4':         return _('Strobe return light not detected')     elif value == '8':         return _('Compulsory flash mode')     elif value == '16':         return _('Auto mode')     elif value == '32':         return _('No flash function')     elif value == '64':         return _('Red eye reduction mode')     return _('Unknown')     class ColumnExtension(GObject.GObject,                       FileManager.ColumnProvider,                       FileManager.InfoProvider):     def __init__(self):         pass       def get_columns(self):         return (             FileManager.Column(name='FileManagerPython::title_column',                                attribute='title',                                label=_('Title'),                                description=_('Song title')),             FileManager.Column(name='FileManagerPython::album_column',                                attribute='album',                                label=_('Album'),                                description=_('Album')),             FileManager.Column(name='FileManagerPython::artist_column',                                attribute='artist',                                label=_('Artist'),                                description=_('Artist')),             FileManager.Column(name='FileManagerPython::tracknumber_column',                                attribute='tracknumber',                                label=_('Track'),                                description=_('Track number')),             FileManager.Column(name='FileManagerPython::genre_column',                                attribute='genre',                                label=_('Genre'),                                description=_('Genre')),             FileManager.Column(name='FileManagerPython::date_column',                                attribute='date',                                label=_('Date'),                                description=_('Date')),             FileManager.Column(name='FileManagerPython::bitrate_column',                                attribute='bitrate',                                label=_('Bitrate'),                                description=_('Audio Bitrate in kilo bits per \ second')),             FileManager.Column(name='FileManagerPython::samplerate_column',                                attribute='samplerate',                                label=_('Sample rate'),                                description=_('Sample rate in Hz')),             FileManager.Column(name='FileManagerPython::length_column',                                attribute='length',                                label=_('Length'),                                description=_('Length of audio')),             # Images             FileManager.Column(name='FileManagerPython::exposure_time_column',                                attribute='exposure_time',                                label=_('Exposure time'),                                description=_('Exposure time in seconds')),             FileManager.Column(name='FileManagerPython::fnumber_column',                                attribute='fnumber',                                label=_('F number'),                                description=_('Exposure F number')),             FileManager.Column(name='FileManagerPython::fnumber_focal_length',                                attribute='focal_length',                                label=_('Focal length'),                                description=_('The actual focal length of the \ lens, in mm.')),             FileManager.Column(name='FileManagerPython::gps_altitude_column',                                attribute='gps_altitude',                                label=_('Altitude'),                                description=_('GPS Altitude')),             FileManager.Column(name='FileManagerPython::gps_latitude_column',                                attribute='gps_latitude',                                label=_('Latitude'),                                description=_('GPS Latitude')),             FileManager.Column(name='FileManagerPython::gps_longitude_column',                                attribute='gps_longitude',                                label=_('Longitude'),                                description=_('GPS Longitude')),             FileManager.Column(name='FileManagerPython::iso_speed_column',                                attribute='iso_speed',                                label=_('ISO'),                                description=_('ISO Speed')),             FileManager.Column(name='FileManagerPython::orientation_column',                                attribute='orientation',                                label=_('Orientation'),                                description=_('Orientation')),             FileManager.Column(name='FileManagerPython::model_column',                                attribute='model',                                label=_('Model'),                                description=_('Model')),             FileManager.Column(name='\ FileManagerPython::resolution_unit_column',                                attribute='resolution_unit',                                label=_('Resolution unit'),                                description=_('The unit for measuring')),             FileManager.Column(name='FileManagerPython::xresolution_column',                                attribute='xresolution',                                label=_('X resolution'),                                description=_('The resolution in the x axis')),             FileManager.Column(name='FileManagerPython::yresolution_column',                                attribute='yresolution',                                label=_('Y resolution'),                                description=_('The resolution in the y axis')),             FileManager.Column(name='\ FileManagerPython::datetime_original_column',                                attribute='datetime_original',                                label=_('Capture date'),                                description=_('Photo capture date')),             FileManager.Column(name='\ FileManagerPython::shutter_speed_value_column',                                attribute='shutter_speed_value',                                label=_('Shutter speed'),                                description=_('Shutter speed')),             FileManager.Column(name='\ FileManagerPython::aperture_value_column',                                attribute='aperture_value',                                label=_('Aperture'),                                description=_('The lens aperture')),             FileManager.Column(name='\ FileManagerPython::brightness_value_column',                                attribute='brightness_value',                                label=_('Brightness'),                                description=_('Brightness')),             FileManager.Column(name='\ FileManagerPython::exposure_bias_value_column',                                attribute='exposure_bias_value',                                label=_('Exposure'),                                description=_('The exposure bias')),             FileManager.Column(name='\ FileManagerPython::max_aperture_value_column',                                attribute='max_aperture_value',                                label=_('Max aperture'),                                description=_(                                     'The smallest F number of the lens')),             FileManager.Column(name='\ FileManagerPython::metering_mode_column',                                attribute='metering_mode',                                label=_('Metering mode'),                                description=_('The metering mode')),             FileManager.Column(name='\ FileManagerPython::light_source_column',                                attribute='light_source',                                label=_('Light source'),                                description=_('The kind of light source')),             FileManager.Column(name='\ FileManagerPython::flash_column',                                attribute='flash',                                label=_('Flash'),                                description=_('Indicates the status of flash \ when the image was shot')),             FileManager.Column(name='\ FileManagerPython::exposure_mode_column',                                attribute='exposure_mode',                                label=_('Exposure mode'),                                description=_('The exposure mode set when the \ image was shot')),             FileManager.Column(name='\ FileManagerPython::gain_control_column',                                attribute='gain_control',                                label=_('Gain control'),                                description=_('The degree of overall image \ gain adjustment')),             FileManager.Column(name='\ FileManagerPython::width_column',                                attribute='width',                                label=_('Width'),                                description=_(                                     'Image/video/pdf width (pixel/mm)')),             FileManager.Column(name='\ FileManagerPython::height_column',                                attribute='height',                                label=_('Height'),                                description=_(                                     'Image/video/pdf height (pixel/mm)')),             FileManager.Column(name='\ FileManagerPython::pages_column',                                attribute='pages',                                label=_('Pages'),                                description=_('Number of pages')),         )       def update_file_info(self, file):         # set defaults to blank         file.add_string_attribute('title', '')         file.add_string_attribute('album', '')         file.add_string_attribute('artist', '')         file.add_string_attribute('tracknumber', '')         file.add_string_attribute('genre', '')         file.add_string_attribute('date', '')         file.add_string_attribute('bitrate', '')         file.add_string_attribute('samplerate', '')         file.add_string_attribute('length', '')         file.add_string_attribute('datetime_original', '')         file.add_string_attribute('exposure_time', '')         file.add_string_attribute('fnumber', '')         file.add_string_attribute('focal_length', '')         file.add_string_attribute('gps_altitude', '')         file.add_string_attribute('gps_latitude', '')         file.add_string_attribute('gps_longitude', '')         file.add_string_attribute('iso_speed', '')         file.add_string_attribute('get_orientation', '')         file.add_string_attribute('model', '')         file.add_string_attribute('resolution_unit', '')         file.add_string_attribute('xresolution', '')         file.add_string_attribute('yresolution', '')         file.add_string_attribute('shutter_speed_value', '')         file.add_string_attribute('aperture_value', '')         file.add_string_attribute('brightness_value', '')         file.add_string_attribute('exposure_bias_value', '')         file.add_string_attribute('max_aperture_value', '')         file.add_string_attribute('metering_mode', '')         file.add_string_attribute('light_source', '')         file.add_string_attribute('flash', '')         file.add_string_attribute('exposure_mode', '')         file.add_string_attribute('gain_control', '')         file.add_string_attribute('width', '')         file.add_string_attribute('height', '')         file.add_string_attribute('pages', '')           if file.get_uri_scheme() != 'file':             return           # strip file:// to get absolute path         filename = urllib.unquote(file.get_uri()[7:])           # mp3 handling         if file.is_mime_type('audio/mpeg'):             # attempt to read ID3 tag             try:                 audio = EasyID3(filename)                 # sometimes the audio variable will not have one of these items                 # defined, that's why there is this long try / except attempt                 try:                     if 'title' in audio.keys():                         file.add_string_attribute('title', audio['title'][0])                     else:                         file.add_string_attribute('title', '')                 except Exception:                     file.add_string_attribute('title', _('Error'))                 try:                     file.add_string_attribute('album', audio['album'][0])                 except Exception:                     file.add_string_attribute('album', _('Error'))                 try:                     file.add_string_attribute('artist', audio['artist'][0])                 except Exception:                     file.add_string_attribute('artist', _('Error'))                 try:                     file.add_string_attribute('tracknumber',                                               audio['tracknumber'][0])                 except Exception:                     file.add_string_attribute('tracknumber', _('Error'))                 try:                     file.add_string_attribute('genre', audio['genre'][0])                 except Exception:                     file.add_string_attribute('genre', _('Error'))                 try:                     file.add_string_attribute('date', audio['date'][0])                 except Exception:                     file.add_string_attribute('date', _('Error'))             except Exception:                 # [SabreWolfy] some files have no ID3 tag and will throw this                 # exception:                 file.add_string_attribute('title', '')                 file.add_string_attribute('album', '')                 file.add_string_attribute('artist', '')                 file.add_string_attribute('tracknumber', '')                 file.add_string_attribute('genre', '')                 file.add_string_attribute('date', '')             # try to read MP3 information (bitrate, length, samplerate)             try:                 mpfile = open(filename)                 mpinfo = MPEGInfo(mpfile)                 file.add_string_attribute(                     'bitrate', str(mpinfo.bitrate / 1000) + ' Kbps')                 file.add_string_attribute(                     'samplerate', str(mpinfo.sample_rate) + ' Hz')                 # [SabreWolfy] added consistent formatting of times in format                 # hh:mm:ss                 # [SabreWolfy[ to allow for correct column sorting by length                 mp3length = '%02i:%02i:%02i' % ((int(mpinfo.length / 3600)),                                                 (int(mpinfo.length / 60 % 60)),                                                 (int(mpinfo.length % 60)))                 mpfile.close()                 file.add_string_attribute('length', mp3length)             except Exception:                 file.add_string_attribute('bitrate', _('Error'))                 file.add_string_attribute('length', _('Error'))                 file.add_string_attribute('samplerate', _('Error'))                 try:                     mpfile.close()                 except Exception:                     pass           # image handling         if file.get_mime_type().split('/')[0] in ('image'):             # EXIF handling routines             try:                 metadata = GExiv2.Metadata(filename)                 try:                     file.add_string_attribute(                         'datetime_original',                         metadata.get_tag_string('Exif.Image.DateTime'))                 except Exception:                     file.add_string_attribute('datetime_original', '')                 try:                     file.add_string_attribute(                         'artist',                         metadata.get_tag_string('Exif.Image.Artist'))                 except Exception:                     file.add_string_attribute('artist', '')                 try:                     file.add_string_attribute(                         'title',                         metadata.get_tag_string('Exif.Image.ImageDescription'))                 except Exception:                     file.add_string_attribute('title', '')                 try:                     file.add_string_attribute(                         'exposure_time',                         metadata.get_exposure_time())                 except Exception:                     file.add_string_attribute('exposure_time', '')                 try:                     file.add_string_attribute(                         'fnumber',                         metadata.get_fnumber())                 except Exception:                     file.add_string_attribute('fnumber', '')                 try:                     file.add_string_attribute(                         'focal_length',                         metadata.get_focal_length())                 except Exception:                     file.add_string_attribute('focal_length', '')                 try:                     file.add_string_attribute(                         'gps_altitude',                         metadata.get_gps_altitude())                 except Exception:                     file.add_string_attribute('gps_altitude', '')                 try:                     file.add_string_attribute(                         'gps_latitude',                         metadata.get_gps_latitude())                 except Exception:                     file.add_string_attribute('gps_latitude', '')                 try:                     file.add_string_attribute(                         'gps_longitude',                         metadata.get_gps_longitude())                 except Exception:                     file.add_string_attribute('gps_longitude', '')                 try:                     file.add_string_attribute(                         'iso_speed',                         metadata.get_iso_speed())                 except Exception:                     file.add_string_attribute('iso_speed', '')                 file.add_string_attribute('orientation',                                           get_orientation(metadata))                 try:                     file.add_string_attribute(                         'model',                         metadata.get_tag_string('Exif.Image.Model'))                 except Exception:                     file.add_string_attribute('model', '')                 file.add_string_attribute('resolution_unit',                                           get_resolution_unit(metadata))                 try:                     file.add_string_attribute(                         'xresolution',                         metadata.get_tag_string('Exif.Image.XResolution'))                 except Exception:                     file.add_string_attribute('xresolution', '')                 try:                     file.add_string_attribute(                         'yresolution',                         metadata.get_tag_string('Exif.Image.YResolution'))                 except Exception:                     file.add_string_attribute('yresolution', '')                 try:                     file.add_string_attribute(                         'shutter_speed_value',                         metadata.get_tag_string(                             'Exif.Photo.ShutterSpeedValue'))                 except Exception:                     file.add_string_attribute('shutter_speed_value', '')                 try:                     file.add_string_attribute(                         'aperture_value',                         metadata.get_tag_string(                             'Exif.Photo.ApertureValue'))                 except Exception:                     file.add_string_attribute('aperture_value', '')                 try:                     file.add_string_attribute(                         'brightness_value',                         metadata.get_tag_string(                             'Exif.Photo.BrightnessValue'))                 except Exception:                     file.add_string_attribute('brightness_value', '')                 try:                     file.add_string_attribute(                         'brightness_value',                         metadata.get_tag_string(                             'Exif.Photo.BrightnessValue'))                 except Exception:                     file.add_string_attribute('brightness_value', '')                 try:                     file.add_string_attribute(                         'exposure_bias_value',                         metadata.get_tag_string(                             'Exif.Photo.ExposureBiasValue'))                 except Exception:                     file.add_string_attribute('exposure_bias_value', '')                 try:                     file.add_string_attribute(                         'max_aperture_value',                         metadata.get_tag_string(                             'Exif.Photo.MaxApertureValue'))                 except Exception:                     file.add_string_attribute('max_aperture_value', '')                 file.add_string_attribute(                     'metering_mode',                     get_metering_mode(metadata))                 file.add_string_attribute(                     'light_source',                     get_light_source(metadata))                 file.add_string_attribute(                     'flash',                     get_flash(metadata))                 file.add_string_attribute(                     'exposure_mode',                     get_exposure_mode(metadata))                 file.add_string_attribute(                     'gain_control',                     get_gain_control(metadata))             except Exception:                 file.add_string_attribute('datetime_original', '')                 file.add_string_attribute('artist', '')                 file.add_string_attribute('title', '')                 file.add_string_attribute('exposure_time', '')                 file.add_string_attribute('fnumber', '')                 file.add_string_attribute('focal_length', '')                 file.add_string_attribute('gps_altitude', '')                 file.add_string_attribute('gps_latitude', '')                 file.add_string_attribute('gps_longitude', '')                 file.add_string_attribute('iso_speed', '')                 file.add_string_attribute('get_orientation', '')                 file.add_string_attribute('model', '')                 file.add_string_attribute('resolution_unit', '')                 file.add_string_attribute('xresolution', '')                 file.add_string_attribute('yresolution', '')                 file.add_string_attribute('shutter_speed_value', '')                 file.add_string_attribute('aperture_value', '')                 file.add_string_attribute('brightness_value', '')                 file.add_string_attribute('exposure_bias_value', '')                 file.add_string_attribute('max_aperture_value', '')                 file.add_string_attribute('metering_mode', '')                 file.add_string_attribute('light_source', '')                 file.add_string_attribute('flash', '')                 file.add_string_attribute('exposure_mode', '')                 file.add_string_attribute('gain_control', '')             try:                 im = Image.open(filename)                 try:                     file.add_string_attribute('width', str(im.size[0]))                 except Exception:                     file.add_string_attribute('width', _('Error'))                 try:                     file.add_string_attribute('height', str(im.size[1]))                 except Exception:                     file.add_string_attribute('height', _('Error'))             except Exception:                 file.add_string_attribute('width', '')                 file.add_string_attribute('height', '')           # video/flac handling         if file.is_mime_type('video/x-msvideo') or\                 file.is_mime_type('video/mpeg') or\                 file.is_mime_type('video/x-ms-wmv') or\                 file.is_mime_type('video/mp4') or\                 file.is_mime_type('audio/x-flac') or\                 file.is_mime_type('video/x-flv') or\                 file.is_mime_type('video/x-matroska') or\                 file.is_mime_type('audio/x-wav'):             try:                 info = kaa.metadata.parse(filename)                 try:                     file.add_string_attribute(                         'length',                         '%02i:%02i:%02i' % ((int(info.length / 3600)),                                             (int(info.length / 60 % 60)),                                             (int(info.length % 60))))                 except Exception:                     file.add_string_attribute('length', _('Error'))                 try:                     file.add_string_attribute('width',                                               str(info.video[0].width))                 except Exception:                     file.add_string_attribute('height', _('Error'))                 try:                     file.add_string_attribute('height',                                               str(info.video[0].height))                 except Exception:                     file.add_string_attribute('width', _('Error'))                 try:                     file.add_string_attribute(                         'bitrate', str(round(info.audio[0].bitrate / 1000)))                 except Exception:                     file.add_string_attribute('bitrate', _('Error'))                 try:                     file.add_string_attribute(                         'samplerate',                         str(int(info.audio[0].samplerate)) + _(' Hz'))                 except Exception:                     file.add_string_attribute('samplerate', _('Error'))                 try:                     file.add_string_attribute('title', info.title)                 except Exception:                     file.add_string_attribute('title', _('Error'))                 try:                     file.add_string_attribute('artist', info.artist)                 except Exception:                     file.add_string_attribute('artist', _('Error'))                 try:                     file.add_string_attribute('genre', info.genre)                 except Exception:                     file.add_string_attribute('genre', _('Error'))                 try:                     file.add_string_attribute('tracknumber', info.trackno)                 except Exception:                     file.add_string_attribute('tracknumber', _('Error'))                 try:                     file.add_string_attribute('date', info.userdate)                 except Exception:                     file.add_string_attribute('date', _('Error'))                 try:                     file.add_string_attribute('album', info.album)                 except Exception:                     file.add_string_attribute('album', _('Error'))             except Exception:                 file.add_string_attribute('length', _('Error'))                 file.add_string_attribute('width', _('Error'))                 file.add_string_attribute('height', _('Error'))                 file.add_string_attribute('bitrate', _('Error'))                 file.add_string_attribute('samplerate', _('Error'))                 file.add_string_attribute('title', _('Error'))                 file.add_string_attribute('artist', _('Error'))                 file.add_string_attribute('genre', _('Error'))                 file.add_string_attribute('track', _('Error'))                 file.add_string_attribute('date', _('Error'))                 file.add_string_attribute('album', _('Error'))         # pdf handling         if file.is_mime_type('application/pdf'):             try:                 f = open(filename, 'rb')                 pdf = PdfFileReader(f)                 info = pdf.getDocumentInfo()                 try:                     file.add_string_attribute(                         'title',                         info.title if info.title is not None else '')                 except Exception:                     file.add_string_attribute('title', _('Error'))                 try:                     file.add_string_attribute(                         'artist',                         info.author if info.author is not None else '')                 except Exception:                     file.add_string_attribute('artist', _('Error'))                 try:                     file.add_string_attribute(                         'pages',                         str(pdf.getNumPages()))                 except Exception:                     file.add_string_attribute('pages', _('Error'))                 if pdf.getNumPages() > 0:                     try:                         width = abs(pdf.getPage(0).mediaBox.upperRight[0] -                                     pdf.getPage(0).mediaBox.lowerLeft[0])                         file.add_string_attribute(                             'width',                             str(int(float(width) * math.sqrt(2.0) / 4.0)))                     except Exception:                         file.add_string_attribute('width', '')                     try:                         height = abs(pdf.getPage(0).mediaBox.upperRight[1] -                                      pdf.getPage(0).mediaBox.lowerLeft[1])                         file.add_string_attribute(                             'height',                             str(int(float(height) * math.sqrt(2.0) / 4.0)))                     except Exception:                         file.add_string_attribute('height', '')                 else:                     file.add_string_attribute('width', '')                     file.add_string_attribute('height', '')                 f.close()             except Exception:                 file.add_string_attribute('title', _('Error'))                 file.add_string_attribute('artist', _('Error'))                 file.add_string_attribute('pages', _('Error'))                 file.add_string_attribute('width', _('Error'))                 file.add_string_attribute('height', _('Error'))         self.get_columns()

the issue seems to be that the script uses the code getDocumentInfo() to pull the metadata from the pdf, but the keywords are stored in the xmpmetadata under the pdf_keywords and is accessed by the code getXmpMetadata () I have no idea how this could be incorporated into the script to make it work. I have managed to alter the first part of the script so I have the Keywords column appear in nautilus but it just shows an error so it is not extracting the information from the pdf properly.

Any help would be much appreciated.

[micseydel]

What's the error that you get?