session1 - python turtle

00_Forge_day1.py

'''
draw a line using turtle
'''

import turtle

t = turtle.Turtle()
t.forward(100)

02_square.py

'''
draw a square
'''

import turtle

t = turtle.Turtle()

t.forward(100)
t.left(90)
t.forward(100)
t.left(90)
t.forward(100)
t.left(90)
t.forward(100)
t.left(90)

03_square_loops.py

'''
draw a square using loop
The statements within the for loop executes 4 times for i values, 0, 1, 2,3
key concept - using loops for repeated statements
'''

import turtle

t = turtle.Turtle()

for i in range(4):
    t.forward(100)
    t.left(90)

04_using_variables.py

'''
draw a square - replace all magic numbers with variables
key concept - using variables for storing values
'''

import turtle

t = turtle.Turtle()

sides = 4
length = 100
angle = 360 / sides

for i in range(sides):
    t.forward(length)
    t.left(angle)

05_using_functions.py

'''
draw a polygon - using a function
key concept - using functions for block of code that performs an action
    syntax: def function_name():
'''

import turtle

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

t = turtle.Turtle()
draw_shape(t, 4, 100)

06_pattern.py

'''
draw a pattern
'''

import turtle

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

t=turtle.Turtle()
t.color("red")
for i in range(20):
    draw_shape(t, 4, 100)
    t.left(18)

07_fill_color.py

'''
fill the polygon with colors
'''
import turtle

t = turtle.Turtle()

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

t.color("green")
t.begin_fill()
draw_shape(t, 4, 100)
t.end_fill()

08_random_shape.py

'''
random shape - draw random shapes with random length
use  the randint() function to get a random integer in a range
'''
import turtle
from random import randint

t = turtle.Turtle()

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

sides = randint(3, 8)
length = randint(50, 300)

t.color("green")
t.begin_fill()
draw_shape(t, sides, length)
t.end_fill()

09_goto_location.py

'''
move the turtle to a location and draw the shape
t.goto(x, y) is used move the turtle to the location(x,y) in screen
'''
import turtle
from random import randint

t = turtle.Turtle()

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

sides = randint(3, 8)
length = randint(50, 300)

t.penup()
t.goto(100, 100)
t.pendown()

t.color("green")
t.begin_fill()
draw_shape(t, sides, length)
t.end_fill()

10_move_function.py

'''
write a function to move the turtle
'''
import turtle
from random import randint

t = turtle.Turtle()

def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

def move(t, x, y):
    t.penup()
    t.goto(x, y)
    t.pendown()

sides = randint(3, 8)
length = randint(50, 300)
move(t, 100, 100)
t.color("green")
t.begin_fill()
draw_shape(t, sides, length)
t.end_fill()

11_using_module.py

'''
move the draw_shape() and move() functions to a module names utils.py and import it here
'''
import turtle
from random import randint
from utils import draw_shape, move

t = turtle.Turtle()
sides = randint(3,8)
length = randint(50,300)

move(t, 100, 100)
t.color("red")
draw_shape(t, sides, 100)
move(t, -100,-100)
draw_shape(t, sides, 100)

12_random_colors.py

'''
get random colour for the shape
use list to store a list of colors to chose from
'''

import turtle
from random import randint
from utils import draw_shape, move

t = turtle.Turtle()
def get_random_color():
    colours = ["violet", "indigo", "blue", "green", "yellow", "orange", "red"]
    shape_color = colours[randint(0, len(colours) - 1)]
    return shape_color

sides = randint(3, 8)
length = randint(50, 300)
move(t, 100, 100)
colour = get_random_color()
t.color(colour)
t.begin_fill()
draw_shape(t, sides, length)
t.end_fill()

13_composite_shape.py

'''
draw a house
'''
import turtle
from random import randint
from utils import draw_shape, move

t = turtle.Turtle()

def get_random_color():
    colours = ["violet", "indigo", "blue", "green", "yellow", "orange", "red"]
    shape_color = colours[randint(0, len(colours) - 1)]
    return shape_color

colour = get_random_color()
t.color(colour)
t.begin_fill()
draw_shape(t, 4, 100)
t.end_fill()

'''triangle roof of the house'''
move(t, 0, 100)
colour = get_random_color()
t.color(colour)
t.begin_fill()
draw_shape(t, 3, 100)
t.end_fill()

'''door of the house'''
move(t, 40, 0)
colour = get_random_color()
t.color(colour)
t.begin_fill()
draw_shape(t, 4, 20)
t.end_fill()

utils.py

'''
utils module with two functions draw_shape and  move
'''
def draw_shape(t, sides, length):
    angle = 360 / sides
    for i in range(sides):
        t.forward(length)
        t.left(angle)

def move(t, x, y):
    t.penup()
    t.goto(x, y)
    t.pendown()