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Drawing an ASCII Shape with Python

In this hands-on lab, we will use Python loops to format our output by attempting to draw a geometric shape composed of asterisks.

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Lab Info
Level
Intermediate
Last updated
Sep 21, 2025
Duration
1h 0m

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Table of Contents
  1. Challenge

    Create an Executable File with the Python Interpreter Path Instruction at the Beginning
    1. Create a file called asciiShape.py:

      touch asciiShape.py
      
    2. Make it executable:

      chmod +x asciiShape.py
      
    3. Insert the instruction for the Python interpreter path:

      vim asciiShape.py
      
      #!/usr/bin/python3
      
  2. Challenge

    Write Two `for` Loops, with One Nested in the Other, to Draw a Pyramid
    length = 10
    astr = "*"
    for i in range(length):
        for j in range(length-i):
            print(" ", end='')
        print(astr)
        astr += "**"
    
  3. Challenge

    Write a Loop to Draw an Upside-Down Pyramid of Proportional Size that Aligns with the First Pyramid
    length -= 1
    space = 1
    astrNum = ((length*2)-1)
    astr = "*" * astrNum
    for i in range(length):
        print(" " + space * " " + astr)
        astrNum -= 2
        astr = "*" * astrNum
        space += 1
    
  4. Challenge

    Test It by Saving and Executing the File
    1. Save and exit by pressing Escape, :wq, and Enter.

    2. Execute the file:

      ./asciiShape.py
      
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