TomFaulkner

Ubuntu 18.04 VFIO GPU passthrough with a single GPU (onboard automatically disables itself)

Hardware

https://www.reddit.com/r/JDM_WAAAT/comments/8zgkfj/server_build_nas_killer_v_20_the_terminator_dual/ 2x X5650 from this thread Aside from that build guide, a generic USB3 card and an AMD R9-200

Grub

Modify /etc/default/grub and add vfio-pci.ids=dead:beef video=efifb:off to GRUB_CMDLINE_LINUX_DEFAULT (use the PCI vid/pid of your primary GPU, not dead:beef)

TomFaulkner

# source: https://stackoverflow.com/a/24577389/9893423
# The MockFoo class still has the methods of the Foo class and it doesn't
# have the methods defined in the parent because the parent is now a  Mock class.

from contextlib import contextmanager

@contextmanager
def patch_parent(class_):
    """
    Mock the bases

TomFaulkner

# spread
# Author:- Rohit Tanwar
# https://github.com/kriadmin/30-seconds-of-python-code
# Contributors:-Rohit Tanwar

# Implements javascript's [].concat(...arr). Flattens the list(non-deep) and returns an list.

def spread(arg):
    ret = []
    for i in arg:

TomFaulkner

# Borrowed from:
# https://stackoverflow.com/questions/2600790/multiple-levels-of-collection-defaultdict-in-python
class AutoVivification(dict):
    """Implementation of perl's autovivification feature."""
    def __getitem__(self, item):
        try:
            return dict.__getitem__(self, item)
        except KeyError:
            value = self[item] = type(self)()
            return value

TomFaulkner

"""Background Loop for running a monitor process

Uses a daemon thread, so no delays in exiting.
Don't use this for things that involve writing data, as weird things
may happen if the daemon dies while writing.

Pass in an a function to call as "action"

This does what I need it for at the moment, for other uses one might
need to extend the action call to pass on parameters or *args, **kwargs.

TomFaulkner

"""
PerpetualTimer: Run a function every x seconds until PerpetualTimer.cancel().

Source, with some modificiations:
https://stackoverflow.com/questions/12435211/python-threading-timer-repeat-function-every-n-seconds

Example usage:
 def printer():
     print('ipsem lorem')

TomFaulkner

"""An extendable Enum

Though this one is probably better:
https://pypi.python.org/pypi/aenum
"""

from enum import Enum

class ExtendableEnum(Enum):
    @classmethod

TomFaulkner

### Keybase proof

I hereby claim:

  * I am tomfaulkner on github.
  * I am tomfaulkner (https://keybase.io/tomfaulkner) on keybase.
  * I have a public key ASC4oGzsjuO8XVLPSyBWTYJemCFTjO4q91585EtPyS1KRwo

To claim this, I am signing this object:

TomFaulkner

"""
Function to filter a string using an optional exact match whitelist (include),
 optional whitelist using regex (include_regex),
 exact match blacklist (exclude), and blacklist regex (exclude_regex)
 
See unittest below for usage examples

Code is from https://github.com/TomFaulkner/pypihole/blob/master/pypihole/helpers/filtering.py,
 check there for updates
"""

TomFaulkner

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]: