Message364665
I ran into this issue when attempting to add a custom _generate_next_value_ method to an existing Enum. Adding the method definition to the bottom of the class causes it to not be called at all:
from enum import Enum, auto
class E(Enum):
A = auto()
B = auto()
def _generate_next_value_(name, *args):
return name
E.B.value # Returns 2, E._generate_next_value_ is not called
class F(Enum):
def _generate_next_value_(name, *args):
return name
A = auto()
B = auto()
F.B.value # Returns 'B', as intended
I do not believe that the order of method/attribute definition should affect the behavior of the class, or at least it should be mentioned in the documentation. |
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Date |
User |
Action |
Args |
2020-03-20 11:25:04 | edd07 | set | recipients:
+ edd07, docs@python |
2020-03-20 11:25:04 | edd07 | set | messageid: <1584703504.0.0.0724934497115.issue40025@roundup.psfhosted.org> |
2020-03-20 11:25:03 | edd07 | link | issue40025 messages |
2020-03-20 11:25:03 | edd07 | create | |
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