def draw_tree(tree, path='tree.jpg'):
w = dt.get_width(tree) * 100
h = dt.get_depth(tree) * 100 + 120
img = Image.new('RGB',(w, h),(255,255,255))
draw = ImageDraw.Draw(img)
draw_node(draw, tree, w / 2,20)
img.save(path,'JPEG')
def draw_tree(tree, path='tree.jpg'):
w = dt.get_width(tree) * 100
h = dt.get_depth(tree) * 100 + 120
img = Image.new('RGB', (w, h), (255, 255, 255))
draw = ImageDraw.Draw(img)
draw_node(draw, tree, w / 2, 20)
img.save(path, 'JPEG')
def draw_node(draw, tree, x, y):
if tree.results == None:
# Get the width of each branch
w1 = dt.get_width(tree.fb) * 100
w2 = dt.get_width(tree.tb) * 100
# Determine the total space required by this node
left = x - (w1 + w2) / 2
right = x + (w1 + w2) / 2
# Draw the condition string
draw.text((x - 20, y - 10), str(tree.col) + ':' + str(tree.value),(0,0,0))
# Draw links to the branches
draw.line((x, y, left + w1 / 2, y + 100), fill = (255,0,0))
draw.line((x, y, right - w2 / 2, y + 100), fill = (255,0,0))
# Draw the branch nodes
draw_node(draw, tree.fb, left + w1 / 2, y + 100)
draw_node(draw, tree.tb, right - w2 / 2, y + 100)
else:
txt = ' \n'.join(['%s:%d'%v for v in tree.results.items()])
draw.text((x - 20, y), txt,(0,0,0))
def draw_node(draw, tree, x, y):
if tree.results == None:
# Get the width of each branch
w1 = dt.get_width(tree.fb) * 100
w2 = dt.get_width(tree.tb) * 100
# Determine the total space required by this node
left = x - (w1 + w2) / 2
right = x + (w1 + w2) / 2
# Draw the condition string
draw.text((x - 20, y - 10),
str(tree.col) + ':' + str(tree.value), (0, 0, 0))
# Draw links to the branches
draw.line((x, y, left + w1 / 2, y + 100), fill=(255, 0, 0))
draw.line((x, y, right - w2 / 2, y + 100), fill=(255, 0, 0))
# Draw the branch nodes
draw_node(draw, tree.fb, left + w1 / 2, y + 100)
draw_node(draw, tree.tb, right - w2 / 2, y + 100)
else:
txt = ' \n'.join(['%s:%d' % v for v in tree.results.items()])
draw.text((x - 20, y), txt, (0, 0, 0))
