Getting cronjob to work from Django

I have a droplet with Django installed and I can run a script from /home/sammy/revamp like python manage.py getimages it returns output like

Successfully found image for "6c90a52a75c5a91054937d6ab3c8cd4e.jpg"

Problem is it never runs itself from crontab -e

*/1 * * * * sammy cd /home/sammy/revamp/ && /usr/bin/python manage.py getimages >> /var/log/getimages.log

This is the last of many editing I’ve done to this log.

Btw here’s it’s code

class Command(BaseCommand):
    help = 'Update images coloured to database'

    def handle(self, *args, **options):
        #get filenames automatically
        try:
            images = listdir('/home/sammy/revamp/revamp/media/new_colour')

            for image_name in images:
                exists = Image.objects.filter(original_image='original/'+image_name)

                if exists:
                    image = exists[0]
                    image.colored_image = File( open('/home/sammy/revamp/revamp/media/new_colour/' + image_name, 'r'))
                    image.save()
                    os.remove('/home/sammy/revamp/revamp/media/new_colour/' + image_name)

                    self.stdout.write(self.style.SUCCESS('Successfully found image for "%s"' % image_name))

        except Exception, e:
            error_log = open('/home/sammy/revamp/error.log','a')
            error.write(str(e) + '\n')
            error.close()              

It should output something to error.log but also doesn’t do this.