Skip to content

Instantly share code, notes, and snippets.

View rileypeterson's full-sized avatar

rileypeterson

11 followers · 10 following
View GitHub Profile
@rileypeterson
rileypeterson / Image to b64 string
Created June 19, 2020 21:06
Insert an image into html img tag
from io import BytesIO
import matplotlib.pyplot as plt
import base64
b = BytesIO()
plt.plot([1,2,3])
plt.savefig(b)
b64_img_str = base64.encodebytes(b.getvalue()).decode()
# In js
# $("#graph1").attr("src", "data:image/png;base64, ".concat(b64_img_str));
@rileypeterson
rileypeterson / slick_code
Created February 21, 2020 07:54
Code snippets I think are cool, but frowned upon or difficult to understand
import numpy as np
1/(0 or np.nan) # Avoid ZeroDivisionError
def get_odds(bet, profit):
_ = lambda x: x + min(-(x % 5), 5 - (x % 5), key=abs)
return round(_(100*(max(profit, bet) / min(bet, -profit, key=abs))))
assert get_odds(1, 1.25) == 125
assert get_odds(1, 1.32) == 130
assert get_odds(1, 0.8) == -125
@rileypeterson
rileypeterson / helpers.sh
Created February 11, 2020 17:40
Useful unix commands
watch -d -n 0.5 free -m
tail -lf /var/log/log.txt
sudo service service@{1..10} restart
@rileypeterson
rileypeterson / socket_blocker.py
Created February 6, 2020 19:56
Socket blocker decorator
# Based on https://github.com/miketheman/pytest-socket/blob/master/pytest_socket.py
import socket
import requests
_true_socket = socket.socket
def _blank(*args, **kwargs):
raise ValueError('socket')
@rileypeterson
rileypeterson / bottom_up_demo.py
Last active January 31, 2020 07:01
Bottom Up Algorithm Demo
import random
import tempfile
import os
import numpy as np
import matplotlib.pyplot as plt
def r_sqr(yi, fi):
ss_res = np.sum((yi - fi) ** 2)
ss_tot = np.sum((yi - np.mean(yi)) ** 2)
if ss_tot == 0:
@rileypeterson
rileypeterson / cool_links.txt
Last active January 30, 2020 03:05
Some cool things
@rileypeterson
rileypeterson / finite_differences_recursion.py
Last active February 8, 2020 07:50
Recursion baby
pts = [(-1, 1), (0, 1), (1, 0), (2, 2), (3, 3), (4, 2)]
def fd(*points, values=None):
if values is None:
values = []
if len(points) == 2:
x0, y0 = points[0]
x1, y1 = points[1]
val = (y1 - y0) / (x1 - x0)
values.append(val)
@rileypeterson
rileypeterson / kd_tree.py
Created October 28, 2019 16:30
KD Tree Demo
from scipy.spatial import cKDTree
import time
import numpy as np
np.random.seed(42)
st = time.time()
a = np.random.rand(40000, 25)
b = np.random.rand(40000, 25)
t0 = cKDTree(a)
@rileypeterson
rileypeterson / important git stuff
Last active January 18, 2023 17:24
# Automatically sets upstream tracking
git config --global push.default current
# Autocomplete
brew install git bash-completion
# Create local branch which tracks existing remote branch
# https://stackoverflow.com/a/9537923/8927098
git checkout --track origin/<branch_name>
@rileypeterson
rileypeterson / pyspark_setup.sh
Last active December 10, 2019 21:58
Ubuntu/vagrant pyspark download
wget http://ftp.wayne.edu/apache/spark/spark-2.4.4/spark-2.4.4-bin-hadoop2.7.tgz
# or another mirror from https://www.apache.org/dyn/closer.lua/spark/spark-2.4.4/spark-2.4.4-bin-hadoop2.7.tgz
tar -xzf spark-2.4.4-bin-hadoop2.7.tgz
export SPARK_HOME=/vagrant/spark-2.4.4-bin-hadoop2.7
export PATH=$SPARK_HOME/bin:$PATH