Update mammography.py

mammography.py

@@ -26,25 +26,25 @@ _BASE_FEATURE_NAMES = [
 ]
 _ENCODING_DICS = {
     "shape": {
-        1: "round",
-        2: "oval",
-        3: "lobular",
-        4: "irregular",
+        "1": "round",
+        "2": "oval",
+        "3": "lobular",
+        "4": "irregular",
     },
     "margin": {
-        1: "circumbscribed",
-        2: "microlobulated",
-        3: "obscured",
-        4: "ill-defined",
-        5: "spiculated",
+        "1": "circumbscribed",
+        "2": "microlobulated",
+        "3": "obscured",
+        "4": "ill-defined",
+        "5": "spiculated",
     },
     "density": {
-        1: "high",
-        2: "iso",
-        3: "low",
-        4: "fat-containing",
-        5: "spiculated",
-    },
+        "1": "high",
+        "2": "iso",
+        "3": "low",
+        "4": "fat-containing",
+        "5": "spiculated",
+    }
 }
 
 DESCRIPTION = "Mammography dataset from the UCI ML repository."