接下来,我们需要定义Enum的值为dict。我们可以在Enum类中添加类属性,并将其设置为一个dict。例如,我们可以定义一个values属性,并将其设置为一个包含多个key-value对的dict: classMyEnum(Enum):values={'KEY1':{'name':'Value 1','value':1},'KEY2':{'name':'Value 2','value':2
# 自己实现class_Dict(dict):def__setitem__(self,key,value):ifkeyinself:raiseTypeError('Attempted to reuse key: %r'%key)super().__setitem__(key,value)classMyMeta(type):@classmethod def__prepare__(metacls,name,bases):d=_Dict()returndclassEnum(metaclass=MyMeta):passclassColor(Enum):red=...
Numbers=enum('ZERO','ONE','TWO') # Numbers.ZERO == 0 and Numbers.ONE == 1 有带值到名称映射的: 1 2 3 4 5 6 7 defenum(*sequential,**named): enums=dict(zip(sequential,range(len(sequential))),**named) reverse=dict((value, key)forkey, valueinenums.iteritems()) enums['revers...
Enum string comparison To compare a string with an enum, extend from thestrclass when declaring your enumeration class, e.g.class Color(str, Enum):. You will then be able to compare a string to an enum member using the equality operator==. How to compare a string with an Enum in Pyt...
clear() print(my_dict) # {} ▍80、合并集合 使用union()方法,返回一个新集合。 first_set = {4, 5, 6} second_set = {1, 2, 3} print(first_set.union(second_set)) # {1, 2, 3, 4, 5, 6} 还可以使用update()方法,将第二个集合的元素插入到第一个集合中去。 first_set = {4, ...
(4)keys():获取字典中所有的key,并输出在一个列表中 print(user_info.keys()) #结果:dict_keys(['name', 'age', 'gender']) 1. 2. (5)values():获取字典中所有的值,并输出在一个列表中 print(user_info.values()) #结果:dict_values(['alex', 27, 'M']) ...
sort_keys参数:表示序列化时是否对dict的key进行排序(dict默认是无序的) #序列化并对key进行排序>>> json.dumps({'a':'str','c': True,'e': 10,'b': 11.1,'d': None,'f': [1, 2, 3],'g':(4, 5, 6)}, sort_keys=True)'{"a": "str", "b": 11.1, "c": true, "d": null...
map(lambda x, (y, z): x, z, dict.items()) 然而,它依然能够完美地适用于不同的理解: {x:z for x, (y, z) in d.items()} 通常,理解在 Python2 和 3 之间差异能够帮助我们更好地‘转义’代码。 map(), .keys(), .values(), .items() 等等,返回的是迭代器而不是列表。迭代器的主要问...
proxies dict {} Proxy server URLs. For more information, see How to configure proxies. use_env_settings bool True If True, allows use of HTTP_PROXY and HTTPS_PROXY environment variables for proxies. If False, the environment variables are ignored. For more information, see How to configure ...
__dict__.keys()) # all convenience functions have been assigned # >> dict_keys(['trigger', 'to_A', 'may_to_A', 'to_B', 'may_to_B', 'go', 'may_go', 'is_A', 'is_B', 'state']) assert model.is_A() # Unresolved attribute reference 'is_A' for class 'Model' # ...