Nick ODell nickodell

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Installing Python 3.6.8 on Raspbian

As of March 2018, Raspbian does not yet include the latest Python release, Python 3.6.8 This means we will have to build it ourselves, and here is how to do it.

Install the required build-tools (some might already be installed on your system).

	// command gcc -Wall -Wextra -pedantic test_sgnd.c -lm -o test_sgnd_c && ./test_sgnd_c
	#include <stdio.h>
	#include <math.h>

	// Test sgnd = dp*(dx/ABS(dx)) for all combinations of [1, 0, -0, 1]
	int main(void)
	{
	const double dp[4] = { 1.0, 0.0, -0.0, -1.0 };
	const double dx[4] = { 1.0, 0.0, -0.0, -1.0 };

	FROM archlinux:latest
	RUN pacman -Syu --noconfirm git base-devel
	RUN useradd nodell \
	&& mkdir /builddir \
	&& chown nodell:nodell /builddir
	USER nodell
	WORKDIR /builddir
	RUN git clone https://aur.archlinux.org/python-scipy-mkl-tbb.git
	USER root
	RUN pacman -Su --noconfirm cython gcc-fortran meson-python pybind11 python-build python-installer python-pythran python-pytest python-hypothesis

	# 1.14.1 was benchmarked outside of SciPy's build directory
	# It was done with the following command
	for i in $(seq 1 7); do python3 bug-22655b.py; done
	# This runs the benchmark fewer times than normal, but this is fine because 1.14.1 is very clearly faster.

	// ==UserScript==
	// @name Remove Search Pulsing
	// @version 1
	// @grant none
	// @match https://stackoverflow.com/*
	// ==/UserScript==


	(new MutationObserver(check)).observe(document, {childList: true, subtree: true});

	import numpy as np
	import cv2
	import scipy.ndimage
	import matplotlib.pyplot as plt

	img = cv2.imread('HjJto.jpg')
	img_rgb = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

	blue = np.array((81, 93, 147)).reshape(1, 1, 3)
	rmse = np.sqrt(((img_rgb - blue)**2).mean(axis=2))

	concatenated = data[['day', 'month', 'year', 'time']].astype(str).agg(' '.join, axis=1)
	data['date'] = pd.to_datetime(concatenated)

	user www-data;
	worker_processes auto;
	pid /run/nginx/nginx.pid; # only line changed from default
	include /etc/nginx/modules-enabled/*.conf;

	events {
	worker_connections 768;
	# multi_accept on;
	}