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Python 3 Learning Materials

Installing

1. I would recommend skipping installing Python on your machine for now. Instead, I would start with something like Google Colab. It's linked to your Google account and Google Drive and they have a generous free tier. This is an excellent environment for first learning Python in and similar to a Jupyter Lab/Notebook environment that you will likely use in the future at some point.
2. After using Google Colab for some time, Python can be installed multiple ways. My recommendations:
   • Windows
     1. Scoop or Chocolatey package manager (scoop install python)
     2. Anaconda/Spyder provides a GUI similar to Matlab's GUI (great for data science, data exploration, or other STEM tasks)
     3. Using Ubuntu under Window's Subsystem for Linux (then see L

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#!/usr/bin/env sh

dd status=progress if=/dev/zero of=/swapfile status=progress bs=1024 count=$[(1024**2)*4] && sync # 4G
chmod 0600 /swapfile
mkswap -L swap /swapfile
swapon /swapfile

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from typing import List

# max_len determines the maximum length in the second dimension of Python list
def max_len(items: List) -> int:
    maxLen = 0
    for item in items:
        if (itemLen := len(item)) > maxLen:
            maxLen = itemLen
    return maxLen

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man  -P 'less -p ^HISTORY\ EXPANSION' bash

##### GLOBS #####
!^      # first argument
!$      # last argument
!*      # all arguments
!:2     # second argument

!:2-3   # second to third arguments
!:2-$   # second to last arguments

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Plex: External Mounted Media

1. Add user to the plex group. usermod -aG plex <user>
2. Get the plex group ID. id -g plex
3. Mount the external media drive from root user. This allows all users of the plex group to rwx on the mounted drive. mount -o umask=0002,gid=<plexGID> /dev/sdX# /mnt/plexMedia

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#!/usr/bin/env sh

##### GO[LANG] #####
godoc & # starts a webserver so run it in the bg
open http://127.0.0.1:6060
fg %<job>

##### RUST #####
rustup doc [--std]

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Update Apt Sources

• sudo <editor> /etc/apt/sources.list (replace editor with nano, vim, or any other command line editor)
  • edit to match included sources.list file
• apt update
• apt upgrade
• apt dist-upgrade

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Following this guide: https://wiki.mobileread.com/wiki/Kindle4NTHacking#SSH.
Using Kindle 4.1 and macOS 10.14.

Jailbreak

1. Connect the Kindle. It should be recognized as a USB Mass Storage Device.
2. Download the jailbreak archive
3. Copy data.tar.gz, ENABLE_DIAGS, and diagnostic_logs to the Kindle folder.
4. Restart the Kindle into Diagnostics Mode.
5. Reboot the Kindle from the Diagnostics Mode. Reboot screen should show jailbroken screensaver.

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#!/usr/bin/ruby
# Create display override file to force Mac OS X to use RGB mode for Display
# see http://embdev.net/topic/284710

require 'base64'

data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

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import itertools

def downsample(x, n, phase=0, roll=False):
    """
    Downsampling compatible with Matlab's implementation, plus an
    additonal argument of roll to allow rolling the end of the iterable
    into the beginning when phase is greater than 0.
    
    Args:
        x: iterable to be downsampled