Got library sort of working

library/management/commands/import_works.py

@@ -0,0 +1,20 @@
+from django.core.management.base import BaseCommand, CommandError
+import argparse
+import csv
+
+from library import models
+
+class Command(BaseCommand):
+    help = 'Imports works from a csv file'
+
+    def add_arguments(self, parser):
+        parser.add_argument('collection', type=int, help="Collection ID")
+        parser.add_argument('source', type=argparse.FileType('r'), help="Source CSV")
+
+    def handle(self, *args, **options):
+
+        collection = models.Collection.objects.get(pk=options['collection'])
+
+        reader = csv.DictReader(options['source'])
+        for row in reader:
+            collection.works.create(name=row['Piece'], composer=row['Composer'], notes=row['Notes'])