Created
November 2, 2023 18:21
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class_get_attr_name_as_string.py
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#!/usr/bin/env python3 | |
class cstr(str): | |
"""to avoid string to be 'interned'""" | |
class Meta(type): | |
def __new__(cls, name, bases, attrs): | |
for k, v in attrs.items(): | |
if not k.startswith("__") and type(v) == str: | |
attrs[k] = cstr(v) | |
return super().__new__(cls, name, bases, attrs) | |
class BaseError(metaclass=Meta): | |
@staticmethod | |
def _get_key_value(x): | |
for k, v in ERROR.__dict__.items(): | |
if v is x: | |
return k.lower() | |
class ERROR(BaseError): | |
USER_NOT_FOUND = "the-same-value" | |
PROVIDER_NOT_FOUND = "the-same-value" | |
assert ERROR._get_key_value(ERROR.USER_NOT_FOUND) == "user_not_found" | |
assert ERROR._get_key_value(ERROR.PROVIDER_NOT_FOUND) == "provider_not_found" |
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