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Solving environment /

Scott H. Hawley drscotthawley

Solving environment /
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drscotthawley /
Last active October 30, 2022 01:52
Wrapper to give einops.rearrange an "inverse"
from einops import rearrange as _rearrange
class RearrangeWrapper():
"wrapper to endow einops.rearrange with an 'inverse' operation"
def __init__(self):
self.shape, self.s = None, None # just in case someone tries to call inverse first
def __call__(self, x, s:str, **kwargs): # this 'forward' call is lightweight to preserve original usage
self.shape, self.s = x.shape, s
return _rearrange(x, s, **kwargs)
drscotthawley /
Last active October 4, 2022 12:12
Tries to multiply two arrays/matrices in a variety of ways; returns what "works"
def magic_mult(a, b):
Tries to multiply two arrays/matrices in a variety of ways
Returns all possible working combos as a dict, with the shapes of their respective outputs
Author: Scott H. Hawley, @drscotthawley
combos = ['a*b', 'a*b.T', 'a.T*b', 'a.T*b.T','b*a', 'b*a.T', 'b.T*a', 'b.T*a.T'] # elementwise multiplications
combos += [s.replace('*',' @ ') for s in combos] # matrix multiplications (I like the space here)
working_combos = {}
for s in combos:
drscotthawley /
Last active October 1, 2022 22:12
SLURM cluster usage tracker Discord bot
#! /usr/bin/env python3
SLURM usage tracker Discord bot by drscotthawley & rom1504
Requires external file token_channel.csv to connect to Discord
Syntax of that file should be:
drscotthawley / Tabular_Spotify.drawio.svg
Created November 8, 2021 23:39
my svg file of tabular data model
View Tabular_Spotify.drawio.svg
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drscotthawley /
Created June 2, 2021 19:38
change webcam settings in realtime
#!/usr/bin/env python3
# Do violence to the Logitech C920s webcam settings in realtime
# To annoy your Zoom-mates by constantly changing the image
from pynput.keyboard import Listener
import os, sys
import random
import time
drscotthawley /
Last active January 25, 2021 15:33
Swaps Validation set with a section of Training set, given a value for k
# In case you didn't think to add k-fold cross-validation until late in your
# ML project,...
# This is built for a situation where datasets are arrays of, say, images.
def kfold_swap(train_X, train_Y, val_X, val_Y, k):
Swaps val with a section of train, given a value for k
"Duct tape" approach used to "retro-fit" k-fold cross-validation while minimally
disturbing the rest of the code, while avoiding reloading data from disk and
keeping RAM use manageable. (e.g. np.append() is bad b/c it would copy all of train)
#! /usr/bin/env python
Simulation of a 'magnetic' pendulum. Actually we'll just use
electrostatic charges instead of magnets, but..good enough, right?
Plots an image showing which source the object is closest to after a certain time
(Note: Depending on params like maxiter, the object may still be moving at the
end of the simulation, so the 'ending position' may not be where it comes to rest.)
This code integrates all the (non-interacting) test objects at once, on the GPU.
drscotthawley /
Last active July 28, 2020 03:12
Little script I use to easily start a new Fastpages/Jekyll/Markdown blog entry
#! /usr/bin/env python
# Little script I use to start a new Markdown blog entry.
# Run from the parent directory above the blog directory,
# or supply a full path to run from anywhere.
# Usage: <title>
# It automatically figures out what the current date is to
# create a new entry, and supplies a default header with a title
# and a bibliography placement
drscotthawley / grpc.patch
Last active October 19, 2021 04:36
Patch for GRPC to work with tensorflow, created from main grpc/ directory
View grpc.patch
diff --git a/src/core/lib/gpr/ b/src/core/lib/gpr/
index 561276f0c2..1af0935e1f 100644
--- a/src/core/lib/gpr/
+++ b/src/core/lib/gpr/
@@ -40,7 +40,7 @@
#include <time.h>
#include <unistd.h>
-static long gettid(void) { return syscall(__NR_gettid); }
+static long sys_gettid(void) { return syscall(__NR_sys_gettid); }
drscotthawley /
Last active November 4, 2019 18:21
Alternative method for calculating "instantaneous frequency" for use with spectrograms.
#! /usr/bin/env python3
# Test script for Phase 'Unrolling' / Instantaneous frequency
# See Jesse Engel's "rainbowgrams" script,
# Modifications by Scott H. Hawley, @drscotthawley and Billy Mitchell
# These modified versions seem to be both more accurate (~2000x less reconstruction error)
# and faster (>20%)
# note, to really see/hear the difference, change dtypes to np.float16!