add submission_history management command

This shows the entire submission history for every problem in a course
for a given user. Takes a course id and student username as input.

lms/djangoapps/courseware/management/commands/submission_history.py

+import json
+
+from django.core.management.base import BaseCommand, CommandError, make_option
+
+from courseware.module_tree_reset import ProctorModuleInfo
+
+
+class Command(BaseCommand):
+    args = "<course_id> <username>"
+    help = """Show submission history for student in course (3.091r)"""
+    option_list = BaseCommand.option_list + (
+        make_option('--csv-output-filename',
+                    dest='csv_output_filename',
+                    action='store',
+                    default=None,
+                    help='Save stats to csv file'),
+    )
+
+    def handle(self, *args, **options):
+        if len(args) != 2:
+            raise CommandError("insufficient arguments")
+
+        course_id, username = args
+
+        lev1 = '-' * 4 + '>'
+        lev2 = '-' * 8 + '>'
+        div = '*' * 50
+
+        pminfo = ProctorModuleInfo(course_id)
+
+        problem_banks = {}
+        for rpmod in pminfo.rpmods:
+            bank = problem_banks[rpmod.procset_name] = []
+            #assignment_set_name = rpmod.ra_ps.display_name
+            for ploc in rpmod.ra_rand.children:
+                problem = pminfo.ms.get_instance(pminfo.course.id, ploc)
+                #problem.assignment_set_name = assignment_set_name
+                bank.append(problem.location.url())
+
+        submission_history = [
+            (bank, pminfo.submission_history(username, problem_banks.get(bank)))
+            for bank in problem_banks]
+
+        skip_blank = True
+        if skip_blank:
+            submission_history = [(i, j) for i, j in submission_history if
+                                  len(j['history_entries']) > 0]
+
+        for bank, entries in submission_history:
+            print lev1, bank
+            for smh in entries['history_entries']:
+                state = json.loads(smh.state)
+                print lev2, div
+                print lev2, 'Location: %s' % smh.student_module.module_state_key
+                print lev2, 'Score: %s/%s' % (smh.grade, smh.max_grade)
+                print lev2, 'Attempts: %s' % state['attempts']
+                print lev2, 'Answers: %s' % state['student_answers']
+                #print lev2, 'State: %s' % state