first version finished

django/utils/dateparse.pyi

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+from datetime import (
+    date,
+    datetime,
+    time,
+    timedelta,
+)
+from typing import Optional
+
+
+def parse_date(value: str) -> Optional[date]: ...
+
+
+def parse_datetime(value: str) -> datetime: ...
+
+
+def parse_duration(value: str) -> Optional[timedelta]: ...
+
+
+def parse_time(value: str) -> Optional[time]: ...