Options for keys list for buildbot try job parser

incremental.py

# Incremental:
        v1_keys = ['jobid', 'branch', 'baserev', 'patch_level', 'patch_body']
        v2_keys = v1_keys + ['repository', 'project']
        v3_keys = v2_keys + ['who']
        v4_keys = v3_keys + ['comment']
        keys = [v1_keys, v2_keys, v3_keys, v4_keys]

tuples.py

# List of tuples:
        keys = [
            # v1:                                                               
            ('jobid', 'branch', 'baserev', 'patch_level', 'patch_body'),
            # v2 introduces repository and project                              
            ('jobid', 'branch', 'baserev', 'patch_level', 'patch_body',
             'repository', 'project'),
            # v3 introduces who                                                 
            ('jobid', 'branch', 'baserev', 'patch_level', 'patch_body',
             'repository', 'project', 'who'),
            # v4 introduces comment                                             
            ('jobid', 'branch', 'baserev', 'patch_level', 'patch_body',
             'repository', 'project', 'who', 'comment')]

I like incremental