Python Labs

Interactive Python labs that run directly in your browser — no account or install needed. Each lab uses Skulpt to run real Python code with turtle graphics right on the page.

• Turtle Commands

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  Learn the core commands that move, turn, and color the turtle — the building blocks of every drawing in this course.

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• Drawing a Square

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  Give the turtle its first drawing commands and watch a square appear using forward() and right().

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• Variables for Your Drawing

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  Store distance and angle in variables so you can resize the whole square by changing just one number.

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• Drawing Polygons with Loops

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  Use a for loop and the 360/sides angle formula to draw any regular polygon with just 9 lines of code.

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• Drawing a Stop Sign

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  Combine variables, a for loop, and begin_fill() / end_fill() to draw a filled red octagon with STOP text.

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• Changing Colors with If-Else

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  Use if/else and the modulo operator % to draw a square with automatically alternating side colors.

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• Functions and Flowers

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  Define a petal() function and call it in a loop to grow a full flower on the canvas.

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• Function Parameters: Four Colored Squares

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  Add color and position parameters to a square() function and call it to place shapes anywhere on the canvas.

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• Random Circles

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  Use random.randint() to scatter 10 colorful circles at unpredictable positions — a different picture every run.

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• Color Lists

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  Create a list of colors, access items by index, and loop through the whole palette to paint a rainbow row of circles.

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• Random Stars

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  Write a star() function and call it with random positions, sizes, and colors to fill the canvas with star art.

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• Reading Output and Error Messages

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  Learn to tell apart black output and red errors, and use print() checkpoints to hunt down bugs.

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• Getting Input from the User

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  Use input() and int() to let the user decide how many shapes to draw while the program is running.

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• Fractal Tree with Recursion

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  Write a function that calls itself to draw a branching tree — each branch spawning two smaller branches.

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• Hex Colors and Styled Text

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  Use six-digit hex codes to access millions of colors and write bold, italic, and large text on the canvas.

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• Plotting a Sine Wave

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  Import math, loop through x values, and use goto() to plot a smooth sine curve across the canvas.

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• Responding to Mouse Clicks

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  Register a click handler with onscreenclick() and draw a colored circle wherever the user clicks.

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