Functions as Enum member values

[Colin McPhail]

Hi,

According to the enum module's documentation an Enum-based enumeration's members can have values of any type:

	"Member values can be anything: int, str, etc.."

I defined one with functions as member values. This seemed to work as long as the functions were defined ahead of the enumeration's definition. However I then noticed that my enumeration class was a bit weird: even although I could reference the enumeration's members individually by name I couldn't iterate through the members in the normal fashion - it seemed to have no members. Also, calling type() on a member gave the result <class 'function'> instead of the expected <enum 'enum name'>.

I am using Python 3.9.5 from python.org on macOS 11.4. Below is a small test script and its output. Are my expectations wrong or is there a problem with Enum?

Regards,
Colin

-------------------------------
from enum import Enum

def connect_impl():
    print("message from connect_impl()")

def help_impl():
    print("message from help_impl()")

class Command1(Enum):
    CONNECT = 1
    HELP = 2

class Command2(Enum):
    CONNECT = connect_impl
    HELP = help_impl

if __name__ == "__main__":

    def print_enum(cls, mbr):
        print(f"{cls.__name__}\n  type(): {type(Command1)}")
        print(f"  type of enum member: {type(mbr)}")
        print(f"  number of members: {len(cls)}")
        print("  enum members:")
        if len(cls) > 0:
            for c in cls:
                print(f"    {c}")
        else:
            print("    <none>")
        print(f"  dir(): {dir(cls)}")

    member_1 = Command1.HELP
    print_enum(Command1, member_1)
    print()

    member_2 = Command2.HELP
    print_enum(Command2, member_2)
    print()
    print("call Command2 member: ", end="")
    member_2()
    print()

-------------------------------
(qt6) % python3 try_enum.py
Command1
  type(): <class 'enum.EnumMeta'>
  type of enum member: <enum 'Command1'>
  number of members: 2
  enum members:
    Command1.CONNECT
    Command1.HELP
  dir(): ['CONNECT', 'HELP', '__class__', '__doc__', '__members__', '__module__']

Command2
  type(): <class 'enum.EnumMeta'>
  type of enum member: <class 'function'>
  number of members: 0
  enum members:
    <none>
  dir(): ['__class__', '__doc__', '__members__', '__module__']

call Command2 member: message from help_impl()

(qt6) % 
-------------------------------