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karel's Issues

Windows support

There are a few issues that need to be fixed for Karel to run on Windows:

  • use windows-curses as python does not include them by default
    • this should not affect other platforms
  • use UTF8 when opening files (also not default on Win)
  • GH Actions: Windows uses ` instead of \ as line continuation in shell, so use neither

Interactive history

For educational purposes, it would be great to go back and forward in history.
Viewing of history is the main feature of "just printing to terminal" missing here with curses.

A "simple" solution could be to create a list of (pairs of) actions to go (forward and) backward.

Issue when running Karel

Hey,

I got this exception when trying to run your code using Python 3.9:

Exception unrelated to screen was raised:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/startup.py", line 47, in try_end_window
    endwin()
_curses.error: must call initscr() first

During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Users/Michal/PycharmProjects/pythonProject/main.py", line 1, in <module>
    from karel_robot.run import *
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/__init__.py", line 23, in <module>
    from .main import *
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/main.py", line 131, in <module>
    from .interactive import *
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/interactive.py", line 4, in <module>
    from .functions import *
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/functions.py", line 7, in <module>
    window: Window = setup_window(cli_args=argv)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/startup.py", line 96, in setup_window
    try_end_window(exception=e)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/startup.py", line 50, in try_end_window
    raise exception
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/run/startup.py", line 79, in setup_window
    window_opt = Window(
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/karel_robot/window.py", line 109, in __init__
    self.screen = curses.initscr()
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/curses/__init__.py", line 29, in initscr
    setupterm(term=_os.environ.get("TERM", "unknown"),
_curses.error: setupterm: could not find terminal

Python 3.6 is not sufficient

The setup.py specifies that the minimal required version of Python is 3.6.

However, with Python 3.6, Karel does not work due to from __future__ import annotations. The actual minimal required version is 3.7.

Make the alerts more visible

The message line is easy to overlook at the bottom of the window.

Possible improvements:

  • use bold
  • use better colours
  • invert colours to blink

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