MASTERS = 40
DEVELOPERS = 30
ALLOW_MASTERS = {'group_id': None,
                 'user_id': None,
                 'access_level_description': 'Masters',
                 'access_level': MASTERS}
ALLOW_DEVELOPERS = {'group_id': None,
                    'user_id': None,
                    'access_level_description': 'Developers + Masters',
                    'access_level': DEVELOPERS}
p_branch = project.protectedbranches.create({'name': 'develop',
                                             'merge_access_levels': [ALLOW_MASTERS, ALLOW_DEVELOPERS],
                                             'push_access_levels': [ALLOW_MASTERS]})

{'merge_access_levels': [{'access_level_description': 'Masters',
   'user_id': None,
   'access_level': 40,
   'group_id': None}],
 'name': 'master',
 'project_id': xxx,
 'push_access_levels': [{'access_level_description': 'Masters',
   'user_id': None,
   'access_level': 40,
   'group_id': None}]}