Generate student version for external files

[guyhoffman]

Hi,

I'm using nbgrader for the first time this semester, and in my assignment, students both write code in the notebook, but also implement functions in external files. They fill out code segments between specifically structured comments, like this:

    def transition(self):
        """Apply HMM transition model
        """
        ############################################################################
        # TODO: Add any needed initialization for the HMM class here.              #
        ############################################################################
        # YOUR CODE HERE

        raise NotImplementedError()

        ############################################################################
        #                             END OF YOUR CODE                             #
        ############################################################################

Is there any way to have the "Generate" function also parse and replace code segments in files outside the notebook? I know that it is copying the whole directory, so maybe there's a hook there?

Right now I am using this somewhat hacky shell script to do the work, but I have to run this step separate and manage both versions of the file.

RELEASE_CODE='raise NotImplementedError()'
SUB_CMD='s/(\s*)(# YOUR CODE HERE)(\s|.)*?(#{76})/\1\2\n\1'$RELEASE_CODE'\n\1\4/g'

for file in mae6710/*.py(.); do 
    echo 'Converting '$file'...'
    perl -0777pe  $SUB_CMD $file > release/$(basename $file)
done

Thanks for this awesome tool!