draw circle using squares

I am checking out a Python course at udacity and found an interesting Python module named Turtle. Now let me share with you a simple code that I just have written.

import turtle

def draw_square():
    window = turtle.Screen()
    window.bgcolor("red")
    
    brad = turtle.Turtle()
    brad.shape("turtle")
    brad.color("yellow")
    brad.speed(5)
    counter = 0
    while counter < 36:
        brad.forward(100)
        brad.right(90)
        brad.forward(100)
        brad.right(90)
        brad.forward(100)
        brad.right(90)
        brad.forward(100)
        brad.right(100)
        counter += 1

    window.exitonclick()

if __name__ == "__main__":
    draw_square()

Just save the code in a file and run it, and you will see something like this: 


Now a simple question for you. How did I come up with the number 36 in the while loop? (while counter < 36).

Comments

Unknown said…
Because you are rotating extra 10° each iteration. So it would take 360/10=36 iteration to complete the circle.
July 23, 2014 at 2:19 PM
Keyser said…
Each loop with draw a new square rotated 10° to the previous one. So 360/10 = 36 rotations will complete the circle.
January 2, 2016 at 2:34 PM
Post a Comment

Popular posts from this blog

Strip HTML tags using Python

We often need to strip HTML tags from string (or HTML source). I usually do it using a simple regular expression in Python. Here is my function to strip HTML tags: def remove_html_tags(data): p = re.compile(r'<.*?>') return p.sub('', data) Here is another function to remove more than one consecutive white spaces: def remove_extra_spaces(data): p = re.compile(r'\s+') return p.sub(' ', data) Note that re module needs to be imported in order to use regular expression. Here you can find an updated code that gets the text from html: http://love-python.blogspot.com/2011/04/html-to-text-in-python.html
Read more

lambda magic to find prime numbers

Find prime number up to 100 with just 3 lines of code. The 4th line is for printing ;) nums = range(2, 100) for i in range(2, 10):     nums = filter(lambda x: x == i or x % i, nums) print nums Isn't it amazing? Check my new post about Prime number: http://love-python.blogspot.com/2010/11/prime-number-generator-in-python-using.html
Read more

Convert text to ASCII and ASCII to text - Python code

Python has a very simple way to convert text to ASCII and ASCII to text. To find the ASCII value of a character use the ord() function. Example: >>> ord('B') 66 To get a character from it's ASCII value use the chr() function. Example: >>> chr(65) 'A' Here is a program to get the list of all characters along with their values: # program to print the list of characters and their ASCII values for value in range(0, 255): print "ASCII Value:", value, "\t", "Character:", chr(value), "\n" Here is another simple ASCII encoding-decoding program: # Convertion from text to ASCII codes message = raw_input("Enter message to encode: ") print "Decoded string (in ASCII):" for ch in message: print ord(ch), print "\n\n" # Convertion from ASCII codes to text message = raw_input("Enter ASCII codes: ") decodedMessage = "" for item in message.split(): decodedMessage += chr
Read more