Python program to draw a bar chart using turtle
Prerequisite: Turtle Programming Basics
Turtle is a Python feature like a drawing board, which lets us command a turtle to draw all over it! We can use functions like a turtle.forward(…) and turtle.right(…) which can move the turtle around. Turtle is a beginner-friendly way to learn Python by running some basic commands and viewing the turtle do it graphically. It is like a drawing board that allows you to draw over it. The turtle module can be used in both object-oriented and procedure-oriented ways.
To draw, Python turtle provides many functions and methods i.e. forward, backward, etc. Some commonly used methods are:
- forward(x): moves the pen in the forward direction by x unit.
- backward(x): moves the pen in the backward direction by x unit.
- right(x): rotate the pen in the clockwise direction by an angle x.
- left(x): rotate the pen in the anticlockwise direction by an angle x.
- penup(): stop drawing of the turtle pen.
- pendown(): start drawing of the turtle pen.
Turtle can be used to draw any static shape (Shape that can be drawn using lines). We all know that
- Import the turtle library.
- Create a function, say drawBar() that takes a turtle object, a height value, and a color name and perform the following steps:
- The function draws vertical rectangles of a given height and fixed width (say 40).
- The function fills the rectangle with the given color name.
- Initialize a list having some numerical values (data for the bar graph).
- Initialize a turtle instance.
- Set up the window and call the drawBar() for each value of the list with the created turtle instance and any color of your choice.
- After completing the above steps, close the turtle instance.
Below is the implementation of the above approach: