December 15th - Star

Task

• Copy the multi-line string 'forest_lines' into an empty Python program.

• Copy the 'changes' list into your program

• Create an empty list called 'star_lines'. 

• Iterate over the items in the list of 'changes': 

  • grab the indicated line from  'forest_lines'

  • use line.replace to switch 'old_text' to 'new_text'

  • append the modified line to star_lines (don't strip its trailing \n).

• Write the contents of star_lines to a text file called star.py

• Today's puzzle solution is the total length of the created file.

NOTE: Since the Python code for creating a turtle called 't' is different for every implementation of the turtle module (there are several) you'll need to add whatever turtle creating code your setup requires to star.py before running it.

forest_lines = '''def draw_tree(x, y, w, h):

 wth = w / 8

 hth = h / 8

 # t.fillcolor('white')

 # draw_rect(x, y, w, h) # bounding box

 t.fillcolor('brown')

 draw_rect(x + wth * 3, y, wth * 2, hth * 2) # trunk

 t.fillcolor('green')

 draw_triangle(x + wth * 0, y + hth * 2, wth * 8, hth * 4)  # base

 draw_triangle(x + wth * 1, y + hth * 4, wth * 6, hth * 3) # middle

 draw_triangle(x + wth * 2, y + hth * 6, wth * 4, hth * 2) # top

def draw_rect(x, y, w, h):  # x,y is bottom left corner

 t.penup()

 t.goto(x, y)

 t.pendown()

 t.begin_fill()

 t.goto(x + w, y)

 t.goto(x + w, y + h)

 t.goto(x, y + h)

 t.goto(x, y)

 t.end_fill()

def draw_triangle(x, y, w, h):  # x,y is bottom left corner

 t.penup()

 t.goto(x, y)

 t.pendown()

 t.begin_fill()

 t.goto(x + w, y)

 t.goto(x + w/2, y+h)

 t.goto(x, y)

 t.end_fill()

# ADD CODE TO DRAW THE PRESENT RECTANGLES

# red present (100's digit)

# blue present (10's digit)

# yellow present (1's digit)

for i, tree in enumerate(trees):

 x,y,w,h = tree

 draw_tree(x, y, w, h)

t.hideturtle()

turtle.update()

'''

changes = [ # line_number, old_text, new_text

   [13, '_rect', '_star'],

   [6, 'brown', 'yellow'],

   [42, 'tree', 'triangle'],

   [9, ' + wth * 0, y + hth * 2, wth * 8, hth * 4', ', y+h*3/4, w, -h'],

   [23, '', ''],

   [24, '', ''],

   [25, '', ''],

   [26, '', ''],

   [27, '', ''],

   [28, '', ''],

   [29, '', ''],

   [30, '', ''],

   [31, '', ''],

   [32, '', ''],

   [23, '', ''],

   [44, 't.hideturtle()', 'draw_star(-50, 50, 100, 100)'],

   ]