我的许多课程都类似于以下课程来代表帐户
class Account(object):
def __init__(self, first, last, age, id, balance):
self.first = first
self.last = last
self.age = age
self.id = id
self.balance = balance
def _info(self):
return self.first, self.last, self.age, self.id, self.balance
def __eq__(self, other):
return self._info == other._info()
def __hash__(self):
return hash((type(self), self.info()))
def ... # other methods follow
但实际上,唯一相关的信息是我关心的属性列表,包括首尾,年龄,ID,余额.是否有标准方法定义遵循此结构的Python类?
乍一看,我想到过namedtuple,但是我不确定那是否允许我在事实之后添加其他方法.真的,我想要类似以下的东西
class Account(object):
attributes = "first last age id balance"
def ... # other methods
最好的方法是什么?
解决方法:
不知道这是多么惯用,但是以下内容可以满足您的要求:
class Slottable:
def __init__(self, *args):
for slot, arg in zip(self.slots.split(' '), args):
setattr(self, slot, arg)
def _info(self):
return tuple(getattr(self, attr) for attr in self.slots.split())
def __eq__(self, other):
return self._info() == other._info()
def __hash__(self):
return hash((type(self), self._info()))
class Account(Slottable):
slots = "first last age id balance"
def fullname(self):
return self.first + " " + self.last
matt = Account("Matthew", "Smith", 28, 666, 1E6)
john = Account("John", "Jones", 46, 667, 1E7)
d = {matt: 5, john: 6} # Hashable
print matt.fullname()
#=> "Matthew Smith"
print john.fullname()
#=> "John Jones"
print matt == matt, matt == john
#=> True False
matt.age = 29 # Happy birthday!
print matt.age
#=> 29