1 files changed, 39 insertions, 1 deletions
diff --git a/numpy/_globals.py b/numpy/_globals.py
index 0b715c870..c88874725 100644
--- a/numpy/_globals.py
+++ b/numpy/_globals.py
@@ -15,8 +15,11 @@ That was not the case when the singleton classes were defined in the numpy
 motivated this module.
 
 """
+import enum
+
 __ALL__ = [
-    'ModuleDeprecationWarning', 'VisibleDeprecationWarning', '_NoValue'
+    'ModuleDeprecationWarning', 'VisibleDeprecationWarning',
+    '_NoValue', '_CopyMode'
     ]
 
 
@@ -89,3 +92,38 @@ class _NoValueType:
 
 
 _NoValue = _NoValueType()
+
+
+class _CopyMode(enum.Enum):
+    """
+    An enumeration for the copy modes supported
+    by numpy.copy() and numpy.array(). The following three modes are supported,
+
+    - ALWAYS: This means that a deep copy of the input
+              array will always be taken.
+    - IF_NEEDED: This means that a deep copy of the input
+                 array will be taken only if necessary.
+    - NEVER: This means that the deep copy will never be taken.
+             If a copy cannot be avoided then a `ValueError` will be
+             raised.
+
+    Note that the buffer-protocol could in theory do copies.  NumPy currently
+    assumes an object exporting the buffer protocol will never do this.
+    """
+
+    ALWAYS = True
+    IF_NEEDED = False
+    NEVER = 2
+
+    def __bool__(self):
+        # For backwards compatiblity
+        if self == _CopyMode.ALWAYS:
+            return True
+
+        if self == _CopyMode.IF_NEEDED:
+            return False
+
+        raise ValueError(f"{self} is neither True nor False.")
+
+
+_CopyMode.__module__ = 'numpy'