Merge pull request #1000 from dshemetov/nancodes_nans

Add nancodes enum util

Author: chinandrew

_delphi_utils_python/delphi_utils/__init__.py

@@ -12,5 +12,6 @@
 from .geomap import GeoMapper
 from .smooth import Smoother
 from .signal import add_prefix
+from .nancodes import Nans
 
 __version__ = "0.1.0"

_delphi_utils_python/delphi_utils/nancodes.py

@@ -0,0 +1,13 @@
+"""Unified not-a-number codes for CMU Delphi codebase."""
+
+from enum import IntEnum
+
+class Nans(IntEnum):
+    """An enum of not-a-number codes for the indicators."""
+
+    NOT_MISSING = 0
+    NOT_APPLICABLE = 1
+    REGION_EXCEPTION = 2
+    PRIVACY = 3
+    DELETED = 4
+    UNKNOWN = 5