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The MITx Grading Library, a python grading library for edX
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ChristopherChudzicki Merge pull request #285 from mitodl/singlestringgrader
Allow SingleListGrader answers to be specified as a string
Latest commit cb9f46f Aug 24, 2019

MITx Grading Library

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A library of graders for edX Custom Response problems.

Version 2.0.2 (changelog)

Copyright 2017-2019 Jolyon Bloomfield and Chris Chudzicki

Licensed under the BSD-3 License.

We thank the MIT Office of Open Learning for their support.

Table of Contents

Demo Course

A demonstration course for the MITx Grading Library can be viewed here. The source code for this course is contained in this repository here.

Documentation for edX Course Authors

Extensive documentation has been compiled for the configuration of the different graders in the library.

Local Installation

This is not required but can be useful for testing configurations in python, rather than in edX.

To install:

Requirements: An installation of Python 2.7 (since this is what edX currently uses) or Python 3.6 or 3.7 (since edX is in the process of upgrading).

  1. (Optional) Create and activate a new python virtual environment.
  2. Clone this repository and cd into it.
  3. Run pip install -r requirements.txt to install the requirements specified in requirements.txt. If using python 3, use requirements3.txt instead.
  4. Run pytest to check that tests are passing. (To invoke tests of just the documentation, you can run the following command: python -m pytest --no-cov --disable-warnings docs/*)


  • What's this voluptuous thing?

Voluptuous is a library that handles configuration validation, while giving (hopefully) meaningful error messages. We use it to automate the checking of the configurations passed into the mitxgraders library. They need to be packaged together in the file.

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