Pythonic way to map enum to api values

I have a proto generated code which has 3 values (values i am interested in)

proto_type.VALUE1
proto_type.VALUE2
proto_type.VALUE3

I have created an enum in my python project.

class MyEnum(Enum):
    VALUE1 = 0
    VALUE2 = 1
    VALUE3 = 2

The sole reason i have done this so that i can restrict callee to use specific values. Now I want to map MyEnum to proto_type values.

I was thinking to create a dictionary i.e.,

Mapping = {
  MyEnum.Value1: imported_proto_type.VALUE1,
  MyEnum.Value2: imported_proto_type.VALUE2,
  MyEnum.Value3: imported_proto_type.VALUE3,
} 

What i wanted to ask is this best pythonic way to do so? Is there any better approach?

Why not just use the proto generated values in your Enum?

class MyEnum(Enum):
  VALUE1 = imported_proto_type.VALUE1
  VALUE2 = imported_proto_type.VALUE2
  VALUE3 = imported_proto_type.VALUE3

Then if you have:

x = MyEnum.VALUE1

You can get at the proto value directly by writing:

x.value

Using dictionary for mapping is very common and easy to understand practice. Now there is another way to handle this without mapping. If the values in proto_type are integers that following way would be better.

from enum import IntEnum

class MyEnum(IntEnum):
    VALUE1 = proto_type.VALUE1
    VALUE2 = proto_type.VALUE2
    VALUE3 = proto_type.VALUE3

Now you can use this as follow.
MyEnum.VALUE1.value