Code Sandbox first steps to full-stack Python
🧭 How this works — full-stack in 10 seconds

You're building a full-stack app:

  • Backend Your Python is the server. It takes inputs and returns a value.
  • Frontend The HTML/CSS/JS is what you see. When you click, it calls the backend with api.call("name", ...).

Edit any tab — it runs live. Interact with your app to run your Python, then press Check my work.

🍃 In the Think in Pipelines track you rebuild MongoDB aggregation stages in plain Python, then race a real database — the scoreboard shows how many lines MongoDB saves.

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Lesson

Beginner

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              Edits run live — interact with your app to call your Python.
              
      
                
              
      
            
      
          
      

          
          

          
          
      
            
      
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                Code with Cody
                Tell Cody what you want — it edits the part you're working on.
              
      
            
      
            
      
              
              
            
      
            
      
              
              
            
      
            
          
      
        
      
      
      

      
      
      
        
      
          
            
            Your App
          
          Booting Python…
        
      

        
        
      
          
          Interact with your app to call your Python →
        
      

        
      
          
          
      
            
            
      Downloading Python (WebAssembly)…
      
            First load only — it gets cached after this.
          
      
        
      

        
        

        
      
          
      
            Console