Python Turtle Fractal Plant

Python Turtle Fractal Plant.py

# As described in http://en.wikipedia.org/wiki/L-system#Example_7:_Fractal_plant
import turtle

ruleInput = ['F', 'X']
ruleOutput = ["FF", "F-[[X]+X]+F[+FX]-X"]
start = "X"

front = 5
turn = 30
stack = []
dirstack = []

turtle.left(90)
turtle.penup()
turtle.setpos(0, -350)
turtle.pendown()
turtle.shape("turtle")

def generate(iteration):
	result = start
	temp = ""
	for i in range(iteration):
		for j in range(len(result)):
			for k in range(len(ruleInput)):
				if (result[j] == ruleInput[k]):
					temp += ruleOutput[k]
					break
				if (k == len(ruleInput)-1):
					temp += result[j]
		result = temp
		temp = ""
	return result

def draw(input):
	for x in input:
		if (x == 'F'):
			turtle.forward(front)
		elif (x == '-'):
			turtle.left(turn)
		elif (x == '+'):
			turtle.right(turn)
		elif (x == '['):
			stack.append(turtle.pos())
			dirstack.append(turtle.heading())
		elif (x == ']'):
			turtle.penup()
			post = stack.pop()
			direc = dirstack.pop()
			turtle.setpos(post)
			turtle.setheading(direc)
			turtle.pendown()
	turtle.hideturtle()
	turtle.done()

draw(generate(6))

Result.md