Building custom template tags in Jinja2 is not an easy task. That used to be the case, which you will see below.

tl;dr: Give jinja2-simple-tags a try.

Why would you create a custom template tag?

From the docs:

By writing extensions you can add custom tags to Jinja. This …

Now that Flask-Meld is working, it's time to start getting things ready for production. I've been wanting to start developing Meld components for Conveyor. Flask-Meld utilizes WebSockets, which Conveyor does not currently support. To make all of the magic happen NGINX and uWSGI configurations will need to be updated to …

After switching from Gmail to self-hosted email, managing the inbox has become more difficult. Making the switch made me realize something; I miss some of the features from Gmail. On my search for an alternative email client, I have seen RoundCube suggested as a web-based, open-source alternative. I started using …

Late in 2019 The Tesla 2.0 battery was finally upgraded. The battery life had finally degraded to the point that it was only getting about 8 miles per charge. The old battery was 48V 10AH, the new battery is a 48V 20AH and The Tesla 2.0 now has …

Resizing a virtualbox disk only works for VDI/VHD and only for dynamic drives

If you have a fixed size drive you need to first clone the drive with the following command (Do this anyway for a backup): VBoxManage clonehd /path/to/ubuntu-vm.vdi ubuntu-vm-clone.vdi

Resize the cloned disk …

I found this tip on the Flask subreddit, such a simple solution to make sure you don't forget to add a @login_rquired to a route. You can enforce user login with Flask-Login by using the @before_request decorator.

@bp.before_request
@login_required
def handle_route_permissions():
    # just used to enforce login required on all …

install archiso

# sudo pacman -S archiso
# sudo -i or su root

create dir to hold arch live
# mkdir -p ~/archlive
# cp -r /usr/share/archiso/configs/releng/* ~/archlive

edit pacman.conf to add achzfs vim ~/archlive/pacman.conf

[archzfs]
SigLevel = Optional TrustAll
Server = http://archzfs.com/$repo/x86_64

add archzfs-linux …

Installing and configuring php on arch linux

• Install php sudo pacman -S php php-fpm php-mcrypt
• Configure timezone in /etc/php/php.ini with date.timezone = America/Denver
• Install and configure mariaDB

sudo pacman -S mariadb
sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql

# uncomment the following lines from …

Follow instructions from the following url to install:

https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-3

change root password: tp root

install some software:

pacman -S sudo gvim

uncomment the visudo line for wheel

$ sed -i 's/#en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen
$ locale-gen
$ echo LANG=en_US.UTF-8 …

Used the following tutorial for generating keys: https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-14-04

To set up a new client

go to /etc/openvpn/easy-rsa run command ./build-key clientname to generate keys then just copy the keys and make a config on the client

files necessary for client

client.crt …

Network config for camera system

# edit the interfaces file `sudo vim /etc/network/interfaces` and add the
following lines

auto lo
iface lo inet loopback

auto eth1
iface eth1 inet static
    address 192.168.10.1
    netmask 255.255.255.0
    mtu 9000
    # to connect to switch, use the following …

From fresh install

install vim, sudo, htop

$ su root
$ apt-get update
$ apt-get install vim sudo htop

export EDITOR=vim

add recorder as sudo $ visudo recorder ALL=(ALL) NOPASSWD: ALL

install needed libraries for cuda install

apt-get install gcc-4.8 make linux-headers-amd64 gcc build-essential

download cuda runfile Version 7.0 (Important …

Had to switch secure boot off of windows mode in the bios

set keyboard layout with # loadkeys dvorak

partition the disk with gdisk gdisk /dev/sda o (create new partition table) n (add new partition) # Needs 2 partitions: EFI (ef00) roughly 500Mb Linux? w (write partition to disk)

make filesystem …

• configure internet connection
• set up partitions
• create filesystems (ext4 ...)

Mount partitions:

(mount root) mount /dev/sda1 /mnt
(mount home) mount /dev/sdb1 /mnt/home

• select a mirror from /etc/pacman.d/mirrorlist

Install base and base-develop

 pacstrap -i /mnt base base-devel

Generate fstab

genfstab -U -p /mnt >> /mnt/etc …

install cups, gsfronts hplib

    pacman -S cups gsfonts hplib

    hp-setup -i

when running the hp-setup command it gave an error that no PPD file was found I also had to change the usb port from a front port to a port on the motherboard for whatever reason. I had to …

created two partitions with gparted. One is a 180GB HDD the other is a 60GB SSD

use dd to create bootable usb drive

Select arch linux x64 install

change keyboard to dvorak

    loadkeys dvorak

mount the devices

    mount /dev/sda1 /mnt
    mkdir /mnt/home
    mount /dev/sdb1 /mnt/home

edit …

Install simplejson

sudo pacman -S python-simplejson

Install py-googlevoice from aur

yaourt -S python-pygooglevoice

Change line 70 of voice.py

in usr/lib/python2.7/site-packages/googlevoice/voice.py galx = re.search(r"name=\"GALX\" type=\"hidden\"\n *value=\"(.+)\"", content).group(1)

Allow runserver to accept requests from any address

By default, the runserver command will not accept outside connections.

python manage.py runserver 127.0.0.0:8000

This will only accept connections from 127.0.0.0, if you are connected to a remote server and not using port forwarding …

Setting up the DXL335 triple axis accelerometer is pretty straight forward. First I soldered 6 straight breakaway headers into the ADXL335 in order to easily plug the breakout board directly into the analog pins in the Arduino.

Once soldered I plugged the accelerometer in to the following pins: