Draw Graph Grid Using Turtle in Python

Prerequisite: Turtle Programming Basics

Turtle is an inbuilt module in Python. It provides drawing using a screen (cardboard) and turtle (pen). To draw something on the screen, we need to move the turtle (pen). To move turtle, there are some functions i.e forward(), backward(), etc.

Approach:

Following steps are used :

• Import turtle
• Set screen
• Make turtle
• Draw the y-axis lines
• Draw the x-axis lines
• Draw the x-axis and y-axis with labeling.

Below is the implementation :

Python3

# import package and making objects
import turtle


sc=turtle.Screen()
trtl=turtle.Turtle()

# method to draw y-axis lines
def drawy(val):

    # line
    trtl.forward(300)

    # set position
    trtl.up()
    trtl.setpos(val,300)
    trtl.down()

    # another line
    trtl.backward(300)

    # set position again
    trtl.up()
    trtl.setpos(val+10,0)
    trtl.down()

# method to draw y-axis lines
def drawx(val):

    # line
    trtl.forward(300)

    # set position
    trtl.up()
    trtl.setpos(300,val)
    trtl.down()

    # another line
    trtl.backward(300)

    # set position again
    trtl.up()
    trtl.setpos(0,val+10)
    trtl.down()

# method to label the graph grid
def lab():

    # set position
    trtl.penup()
    trtl.setpos(155,155)
    trtl.pendown()

    # write 0
    trtl.write(0,font=("Verdana", 12, "bold"))

    # set position again
    trtl.penup()
    trtl.setpos(290,155)
    trtl.pendown()

    # write x
    trtl.write("x",font=("Verdana", 12, "bold"))

    # set position again
    trtl.penup()
    trtl.setpos(155,290)
    trtl.pendown()

    # write y
    trtl.write("y",font=("Verdana", 12, "bold"))


# Main Section
# set screen
sc.setup(800,800)

# set turtle features
trtl.speed(100)
trtl.left(90)
trtl.color('lightgreen')

# y lines
for i in range(30):
    drawy(10*(i+1))

# set position for x lines
trtl.right(90)
trtl.up()
trtl.setpos(0,0)
trtl.down()

# x lines
for i in range(30):
    drawx(10*(i+1))

# axis
trtl.color('green')

# set position for x axis
trtl.up()
trtl.setpos(0,150)
trtl.down()

# x-axis
trtl.forward(300)

# set position for y axis
trtl.left(90)
trtl.up()
trtl.setpos(150,0)
trtl.down()

# y-axis
trtl.forward(300)

# labeling
lab()

# hide the turtle
trtl.hideturtle()

Output :