Summer of Code/2013/Turtle Blocks Python export project

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< Summer of Code‎ | 2013
Revision as of 12:36, 13 June 2013 by Marion Zepf (talk | contribs) (add mentors, repositories, section for decisions)
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This page tracks the progress of Marion Zepf's GSoC project, "Turtle Blocks Python export." An abstract and a motivational statement can be found on the project proposal page, along with other details.

The mentors for this project are Walter Bender and Claudia Urrea.


I develop my project in a branch called gsoc-python-export on Gitorious. Design documents, sample code, etc. go into ta-python-export-dev on GitHub.


The following timeline will be modified as the project evolves.

  • June 17 – June 30 (2 weeks): Determine what code needs to be shared by Turtle Blocks and the exported code. Restructure the modules to isolate this part, so it can easily be imported. Only cover the modules that are necessary to run blocks from the 'Turtle', 'Pen', and 'Pen colors' palettes. Deal with the other modules when implementing the corresponding blocks.
  • July 1 – July 21 (3 weeks): Implement the first transformations from blocks to Python code. Only cover the following blocks from the 'Turtle' palette: 'forward', 'back', 'left', and 'right'. Make sure the exported code imports the correct modules from Turtle Blocks and can be run on the command line (or in Pippy). Keep the implementation modular, so more blocks can be added easily.
  • July 22 – July 28 (1 week): Implement transformations of the rest of the 'Turtle' palette, and the complete 'Pen' and 'Pen colors' palettes. (These should be similar enough to the first four blocks that they can be implemented quickly.)
  • July 29 – August 2: Midterm evaluation: Block programs can be exported to Python code that can be run outside of Turtle Blocks. The export functionality is limited to blocks from the 'Turtle', 'Pen', and 'Pen colors' palette, but it can easily be extended to cover the other blocks.
  • August 3 – September 15 (6 weeks): Implement transformations of all other blocks to Python code:
    • August 3 – August 11 (1 week)
      • Numeric operations from the 'Numeric operators' palette and screen dimensions from the 'Presentation templates' palette[note 1]
      • Boolean operations from the 'Numeric operators' palette and conditionals from the 'Flow operators' palette
    • August 12 – August 18 (1 week)
      • Variables from the 'Action stacks' palette and heaps from the 'Extra options' palette
      • Loops from the 'Flow operators' palette and functions from the 'Action stacks' palette
    • August 19 – August 25 (1 week)
      • Runtime control (e.g., exit, suspension) from the 'Flow operators' palette
      • External functions (chr, int, mathematical function, from the 'Extra options' palette[note 1]
    • August 26 – September 1 (1 week)
      • Comments from the 'Extra options' palette: This is especially difficult because Python's ast module does not support comments natively.
    • September 2 – September 8 (1 week)
      • Events and user input from the 'Sensors' palette[note 1]
      • Sounds and sprites from the 'Media' palette and presentation templates from the 'Presentation templates' palette[note 1]
    • September 9 – September 15 (1 week)
      • Multiple turtles and custom turtle shells from the 'Extra options' palette[note 1]
      • Display management (hide/ show blocks, toggle full screen) from the 'Presentation templates' palette, and printing and loading blocks and palettes from the 'Extra options' palette:[note 1]
  • September 16 – September 23 (1 week): Test exporting different kinds of blocks in combination. Fix the last bugs. Clean up.


  1. 1.0 1.1 1.2 1.3 1.4 1.5 This may require importing additional modules from Turtle Blocks.


This section lists important design decisions.