Implement Graph Algorithm Grouping Method with CLI

[Lancasterwu]

Description of Pull Request

Fixes #190 Fixes #234

Type of Change

This PR is the second step of fixing issue #190, after PR#229 and before the testing and documentation. The following changes have been made:

• Add code to parse_argument.py in order to recognize new command: --graph, which runs the graph algorithm grouping.
• Add code to gatorgrouper_cli.py to allow run the command and get the output of graph algorithm grouping.
• Add code to read_student_file.py to make it be able to accept float input and generate it to the list of list which contains float. Fixes issue 234
• Add two new pytest fixtures in conftest.py which allow developer to write test case with temporary csv file that contains float. One is the csv that has header, another one is the csv that does not have header.
• Add two new test function for read_student_file.py to test if the float input can be handled properly.
• Restructured group_graph.py in order to use the matching input that other files passing in, and the matching output that can be passed to other file.

Note that implementing Graph Algorithm Grouping Method with CLI is not completed, the test case for group_graph.py and the documentation are still missing. In order to match the output and input there are some really bad designs in group_graph.py which also need to be refactored.

Please describe the pull request as one of the following:

• [ ] Bug fix
• [x] Breaking change
• [x] New feature
• [ ] Documentation update
• [ ] Other

Tags

@GatorEducator/team-lancaster should be responsible to provide documentation and test case for this ASAP. Please contact me @aubreypc @paladp @huangs1 if you find any bug.

[aubreypc]

Refactored compatibility():

• Supports multiple measures of compatibility
• Supports passing in custom measures of compatibility
• Supports using different measures for different columns of the data
• Renamed preferences -> objective_weights to avoid confusion

[Lancasterwu]

I think this PR should be merged then we can work on the test case, documentation and refactoring in a new branch.

[aubreypc]

New feature added to optionally use student preferences as a scalar multiple on the compatibility scores. A command line interface for preferences can be implemented either in this PR or a new one, depending on how soon we want to merge this.