当你遇到错误 "name 'enum' is not defined" 时,通常意味着 Python 解释器无法识别 enum 这个名称,因为它没有被正确定义或导入。以下是一些可能的解决方案和检查步骤: 确认'enum'模块是否已正确导入: 在Python 中,enum 是一个内置模块,用于定义枚举类型。如果你的代码中没有导入 enum,Python 解释器将无法识别
I pip install gsutil on a Mac OS 10.10 laptop and receive this error. I was under the impression that enum was a python 3.4 feature. The pypi package may need updating to list this as a dependency?
解决方法 (1)对于 Python 2.X版本,使用如下代码: import sys reload(sys) sys.setdefaultencoding("utf-8") 1. 2. 3. (2)对于 版本 <= Python 3.3,使用如下代码: import imp imp.reload(sys) 1. 2. (3)对于版本 >= Python 3.4,使用如下代码: import sys import importlib importlib.reload(sys) 1...
如 _order__raiseValueError('_names_ are reserved for future Enum use')elif_is_dunder(key):# 双下划线结尾的, 如 __new__ifkey=='__order__':key='_order_'elif key inself._member_names:# 重复定义的 keyraiseTypeError('Attempted to reuse key: %r'%key)elif not_is_descriptor(value):# ...
这里通过IntEnum来看一下Python的MetaClass和类初始化过程中的一些黑科技。 一、使用示例 from enum import Enum, IntEnum, auto 1. class Shape(IntEnum): 2. CIRCLE = auto() 3. SQUARE = auto() 4. class Color…
Python 的 enum 模块源码分析 作者:weapon,闲来笑浮生悬笔一卷入毫端,朱绂临身可与言者不过二三。 博客:zhihu.com/people/hong-wei-peng 要想阅读这部分,需要对元类编程有所了解。 成员名不允许重复 这部分我的第一个想法是去控制__dict__中的 key 。但这样的方式并不好,__dict__范围大,它包含该类的...
In Python 3.12 it will be possible to check for member values and not just members; until then, a TypeError will be raised if a non-Enum-member is used in a containment check. __dir__(cls) Returns ['__class__', '__doc__', '__members__', '__module__'] and the names of ...
If it fails, then the class will not be picklable. Similarly, if qualname isn’t set, then Python will set it to the global scope, which may cause your enumerations to fail unpickling in some situations. The type argument is required when you want to provide a mixin class for your ...
(value)iscls:returnvalue# 尝试从 _value2member_map_ 获取try:ifvalueincls._value2member_map_:returncls._value2member_map_[value]exceptTypeError:# 从 _member_map_ 映射获取formemberincls._member_map_.values():ifmember._value_==value:returnmemberraiseValueError("%ris not a valid%s"%(value,...
Becauseby_designandclosedare aliases for other members, they do not appear separately in the output when iterating over theEnum. The canonical name for a member is the first name attached to the value. $ python3 enum_aliases.py new = 7 ...