Document EnumArray basic operations

Author: Mauko Quiroga

openfisca_core/indexed_enums/enum_array.py

@@ -40,6 +40,18 @@ class EnumArray(numpy.ndarray):
         >>> str(enum_array)
         "['Tenant']"
 
+        >>> tuple(enum_array)
+        (1,)
+
+        >>> enum_array[0]
+        1
+
+        >>> enum_array[0] in enum_array
+        True
+
+        >>> len(enum_array)
+        1
+
         >>> enum_array = EnumArray(list(Housing), Housing)
         >>> enum_array[Housing.Tenant.index]
         <Housing.Tenant(Tenant)>