Blog – Nicolas Kuttler

Dump all bitcoin private keys

2015-01-09

I have used this script to export all private keys in a wallet. The blockchain does not have to be synced, but the wallet obviously has to be unlocked (with walletpassphrase). No warranty. more

Recently I wanted to nicely format some code, so I made a CSS-only terminal. The reason I think this one is nice is that it doesn't require any superfluous or non-semantic markup. It is very lightweight, which is good, but wasn't made to be interactive. It doesn't mimic any particular … more

WordPress emergency admin

2014-10-14

I received an emergency call from a client, his WordPress site didn't work. None of the logins either. Well, here's another script to the rescue if all you have left is an ftp login or some other way to upload files. It will create a new admin user with the … more

Pepperflash plugin in wheezy fix

2014-09-15

The pepperflashplugin-nonfree package in wheezy-backports is broken, as it downloads the flash plugin from the latest chrome release and installs it. The latest release links against libc6 2.14 which is not available in wheezy. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=761184 https://lists.debian.org/debian-backports/2014/09/msg00051.html more

Gradient as Gnome 3 background, from the command line

2014-08-21

This was quite easy, but I had to find the necessary bits of information first. I wanted to set the Gnome 3 background to a gradient, from the command line. Below I also list the commands that let you explore available keys and values. more

Android, nomedia and the audio library

2014-05-28

I recently bought a new Android Phone with KitKat. This is the first time I'm using Android for more than simple phone calls and the occasional route planning. It's a quite decent OS. However, one thing that happened to me was a usability nightmare. I use the phone to listen … more

Migrating Django projects with fixtures

2014-05-07

When migrating a Django project it's often useful to work with the built-in dumpdata and loaddata management commands. However, this can easily lead to errors like django.db.utils.IntegrityError: Problem installing fixture Could not load foo.Bar(pk=ba): (1062, "Duplicate entry for key 'app_label'"). Such errors indictate that a similar object already exists in … more

RuntimeError: App registry isn't ready yet

2014-04-13

The upcoming Django 1.7 has many interesting and welcomed changes. One of them is an update to how applications are loaded. The relase notes also mention potential problems with these changes. I ran into RuntimeError: App registry isn't ready yet while using the self-contained tests approach, but the fix is … more

Django-filter and custom querysets

2014-03-21

Django-filter is a powerful tool, but the documentation is a little sparse. If you want to see examples of custom Filters you have to dive into the source code. I recently wanted to add a filter for methods on a custom QuerySet. Unlike custom managers, custom QuerySets allow you to … more

Using django-tables2, django-filter and django-crispy-forms together

2014-03-18

I was recently working on a very CRUDy prototype and decided to use some Django applications and tools together I hadn't combined yet: Django-tables2, an excellent application that allows you to quickly build tables Django-filter for easy filtering Django-crispy-forms for easy form creation A view that uses all three apps … more