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

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# 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 trtle
trtl.hideturtle()

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