expressionTree.py 1.43 KB
 mrk022 committed Nov 27, 2019 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 ``````# Equation Tree class # AI Final Project # Takes an equation of the form x + 3 = 5 + x and makes this into an equation tree # this means = is in root and each expression is a tree on either side # currently only works for addition and two variables on each side of equation class EquationTreeNode: def __init__(self, value, parent=None): self.value = value self.left = None self.right = None self.parent = parent def setLeft(self, newNode): self.left = newNode def setRight(self, newNode): self.right = newNode def addLeftNode(self, newNode): self.left = newNode newNode.parent = self def addRightNode(self, newNode): self.right = newNode newNode.parent = self def splitExpression(self, expression): expressions = expression.split("+") leftNode = EquationTreeNode(expressions[0]) rightNode = EquationTreeNode(expressions[1]) self.addLeftNode(leftNode) self.addRightNode(rightNode) '''def main(): equation = "3x+5=2+2x" expressions = equation.split("=") rootNode = EquationTreeNode("=", None) leftNode = EquationTreeNode("+") rootNode.addLeftNode(leftNode) splitExpression(expressions[0], leftNode) rightNode = EquationTreeNode("+") rootNode.addRightNode(rightNode) splitExpression(expressions[1], rightNode) print(rootNode.value) print(rootNode.left.value, rootNode.right.value) print(rootNode.left.left.value, rootNode.left.right.value, rootNode.right.left.value, rootNode.right.right.value) main() '''``````