Some helpers to help writing correction bots, use by hackinscience.org.
Project description
Correction Helper
Project
This is just a set of tools to help writing correction bots in Python for Python.
It is used for hackinscience, but could be used elsewhere.
Security considerations
Running student code is probably really unsafe, unless you trust your students not to drop you a backdoor.
This projet does not help with security in any ways, maybe take a
look at firejail if you have
trust issues (Yes you can use correction-helper inside firejail).
Usage
To install it, run: pip install correction-helper.
In your checking code, you can use it like this:
The student_code decorator
This decorator is aimed to catch most problems that could happen in student code, use it simply as:
with student_code():
their_function()
Find a more complete example in the examples/ directory.
Allowed parameters for student_code, and their default values
exception_prefix="Got an exception:"
Printed right before the exception, if any.
friendly=False
To use, or not friendly-traceback instead of bare Python exceptions.
print_allowed=True
To allow or deny the student to print to stdout and stderr.
True: Prints are allowed (and displayed).None: Prints are allowed (but not displayed).False: Prints are disallowed (and displayed).
In all cases you can read what they printed using the value of the context manager:
with student_code(print_allowed=None) as run:
their_function()
assert run.stderr == ""
assert run.stdout == "42"
print_prefix="Your code printed:"
Message to display before the student output in case print_allowed is False or None.
It's allowed to give a list of strings, in which case they'll be
separated by "\n\n", useful to render markdown paragraphs.
Good practices
Write the student checking code a you would write unit test for your own code.
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