# Required Experimental Files¶

Wallace is flexible with regards to the form the front end takes. However, there are a number of required or forbidden files. You can verify that a directory is compatible by running :ref:wallace verify <wallace-verify> from a terminal within the directory. Though just because these checks pass doesn’t mean the experiment will run! The minimal required structure is as follows:

Blue items are (optional) directories (note that the experiment directory can have any name), green items are required files (the README file can be either a txt file or a md file), and red items are forbidden files that will cause a conflict at run time.

## Required files¶

• config.txt - The config file contains a variety of parameters that affect how Wallace runs. For more info see...
• experiment.py - This is a python file containing the custom experiment code.
• README.txt/md - This (hopefully) contains a helpful description of the experiment.

## Forbidden files¶

A number of files cannot be included in the experiment directory. This is because, when Wallace runs, it inserts a number of required files into the experiment directory and will overwrite any files with the same name. The files are as follows:

• complete.html - this html page shows when wallace is run in debug mode and the experiment is complete.
• error_wallace.html - this is a flexible error page that shows when something goes wrong.
• launch.html - this page is shown when the /launch route is pinged and the experiment starts successfully.
• robots.txt - this file is returned to bots (e.g. from Google) that bump into the experiment when crawling the internet.
• wallace.js - this is a javascript library with a number of helpful functions.
• reqwest.min.js - this is required for wallace.js to work.
• wallace.css - this contains several css classes that are used in the examples.