mathemakitten

# Tic Tac Toe

# Initialize Board class and define methods
class Board:
	def __init__(self):
		""" This is the state of the game, where 0 = occupied by O, 1 = occupied by X, None = empty """
		self.game_state = [[None, None, None], [None, None, None], [None, None, None]]
		self.board_full = False
		self.dictionary = {0: 'O', 1: 'X', None: ' '}

mathemakitten

# Implementing a neural network from scratch
# Input: X, a matrix of predictors 
# Input: y, a matrix of labels 
# Return: A matrix of predictions
# Architecture: Two layers feedforward neural network

import numpy as np 

# Activation function σ(x)
def sigmoid(x):