Add a missing file

finance/importers.py

@@ -0,0 +1,19 @@
+"""A collection of data import functions."""
+from datetime import datetime
+
+from typedecorator import typed
+
+from finance.models import Asset, AssetValue, get_asset_by_stock_code, \
+    Granularity
+from finance.providers.provider import AssetValueProvider
+
+
+@typed
+def import_stock_values(provider: AssetValueProvider, code: str,
+                        from_date: datetime, to_date: datetime):
+    asset = get_asset_by_stock_code(code)
+    data = provider.fetch_data(code, from_date, to_date)
+    for date, open_, high, low, close_, volume, adj_close in data:
+        AssetValue.create(
+            evaluated_at=date, granularity=Granularity.day, asset=asset,
+            open=open_, high=high, low=low, close=close_, volume=volume)