HelenXi

HelenXi / pg-pong.py

Created September 17, 2017 02:29 — forked from karpathy/pg-pong.py

Training a Neural Network ATARI Pong agent with Policy Gradients from raw pixels

	""" Trains an agent with (stochastic) Policy Gradients on Pong. Uses OpenAI Gym. """
	import numpy as np
	import cPickle as pickle
	import gym

	# hyperparameters
	H = 200 # number of hidden layer neurons
	batch_size = 10 # every how many episodes to do a param update?
	learning_rate = 1e-4
	gamma = 0.99 # discount factor for reward

HelenXi / ecc.py

Created May 15, 2017 17:29 — forked from bellbind/ecc.py

[python]basics of elliptic curve cryptography

	# Basics of Elliptic Curve Cryptography implementation on Python
	import collections


	def inv(n, q):
	"""div on PN modulo a/b mod q as a * inv(b, q) mod q
	>>> assert n * inv(n, q) % q == 1
	"""
	for i in range(q):
	if (n * i) % q == 1: