danilobellini’s gists

danilobellini / ethereum_note.py

Created July 24, 2018 17:53

Sanic (Python) web server for storing a single information note in the Ethereum blockchain

	"""
	Application to store a single message note in the Ethereum blockchain.
	In order to run this web server, the ethereum node daemon
	(e.g. the Geth HTTP RPC on 8545) should be running in the same host.

	Input parameters should be on the following environment variables:

	export ETH_CONTRACT_ADDRESS=0xAAAA... # Enforced
	export ETH_NODE_URL='http://localhost:8545' # Optional

danilobellini / example.py

Created May 13, 2018 18:08

A really simple/incomplete bottle/flask-like "single blocking worker thread" web server implementation (Python 2)

	from server import WebServer
	app = WebServer()

	@app.route("/")
	def root():
	return "Hello World!"

	@app.route("/file")
	def file_route():
	with open("server.py", "rb") as f:

danilobellini / genetic.py

Last active October 18, 2017 16:37

A "Hello World" genetic algorithm I've made based on the C# code shown by Italo Jose de Oliveira at his TDC São Paulo 2017 presentation

	#!/usr/bin/python3
	"""
	Genetic algorithm example that finds the best string match using the
	hamming distance to define an aptitude function.
	"""
	from random import choice, seed, randrange
	from functools import partial
	import string

	def crossover(a, b):

danilobellini / kruskal.py

Last active October 30, 2021 13:42

Kruskal's algorithm

	"""
	Kruskal's algorithm

	Pure Python implementation by Danilo J. S. Bellini
	"""
	import pytest


	def kruskal_sets(graph):
	nodes = frozenset.union(*graph)

danilobellini / plugin_talk_ptbr_2016.py

Created July 26, 2016 06:36

[Proposta/ementa de apresentação] Plugin pytest-doctest-custom (2016, PtBr)

	#!/usr/bin/env python
	# coding: utf-8
	"""
	>>> "Apresentação sobre doctest e py.test" is "nice"
	True
	>>> "O.o heeey, como assim?"
	HUAHUAHUAHUA
	>>> "Apresentação sobre doctest e py.test" is "a bad idea"
	False
	>>> # Ok, ¬¬ chega de strings

danilobellini / viral_maths_puzzle_sympy_solution.py

Created May 2, 2016 20:52

Smallest quadratic equations that answers a viral math puzzle using Sympy

	#!/usr/bin/python
	# By Danilo J. S. Bellini
	# 2016-05-02 17:31:56 BRT
	"""
	Smallest quadratic equations that answers the viral math puzzle below,
	using Sympy
	1 + 4 = 5
	2 + 5 = 12
	3 + 6 = 21
	8 + 11 = ?

danilobellini / inline_or_funcptr.cpp

Created September 25, 2014 03:34

Inline and function pointer example (C++ but that's almost C)

	// Created on Thu Sep 25 00:23:24 2014
	// @author: Danilo de Jesus da Silva Bellini
	// Inline and function pointer example (C++ but that's almost C)
	//
	// g++ inline_or_funcptr.cpp
	//
	#include <iostream>
	using namespace std;

	typedef int (*IntOpPtr)(int, int);

danilobellini / python_nordeste_show.py

Created January 8, 2014 07:36

"AudioLazy Band Show" Python Nordeste 2014 talk proposal description

	# -- coding: utf-8 --
	# Created on Wed Jan 8 04:03:53 2014
	# @author: Danilo J. S. Bellini

	# Python Nordeste 2014 talk proposal description
	# http://2014.pythonnordeste.org/

	# Type it in IPython Shell.

	# Using this as a script would need to replace lazy_band assignment to

danilobellini / closure.clj

Last active May 23, 2020 13:46

Simple closure example in Scheme, Haskell, Smalltalk, Python, Ruby, Clojure, CoffeeScript and JavaScript/ECMAScript

danilobellini / divisors.py

Last active July 25, 2016 12:46

Find all the divisors from a given number

	#!/usr/bin/env python
	# -- coding: utf-8 --
	# Created on Wed Oct 30 10:55:51 2013
	# By Danilo J. S. Bellini
	# Based on https://gist.github.com/anonymous/7123189
	"""
	Find all the divisors from a given number
	"""

	# Ensure compatibility in both Python 2 and 3

Danilo de Jesus da Silva Bellini danilobellini