我正在尝试从文本文件输入初始化派生类。我想要做的一个简单例子:
file.txt的:
1
2
main.py:
class Base:
def __init__(self, val1):
self.val1 = val1
def input_from_text(cls, init_deque):
#return cls(init_deque.popleft())
class Derived(Base):
def __init__(self, val1, val2):
Base.__init__(self, val1)
self.val2 = val2
def input_from_text(cls, init_deque):
#initialize base and derived here and return derived
def main(argv=None):
initialized_derived = Derived.input_from_text(deque(open("file.txt")))
assert initialized_derived.val1 is 1
assert initialized_derived.val2 is 2
这样做有好办法吗?基本上寻找类似于C ++中的内容:
//calls operator>>(Base) then operator>>(Derived)
cin >> initialized_derived;
这样每个类都被很好地封装,基类/派生类不需要知道彼此的任何事情(除了__init__,它知道args基数的数量)。
答案 0 :(得分:1)
刚才意识到我正在以错误的方式解决这个问题。简单的解决方法是执行以下操作:
class Base:
def __init__(self):
pass
def input_from_text(self, init_deque):
self.val1 = init_deque.popleft()
class Derived(Base):
def __init__(self):
Base.__init__(self)
def input_from_text(self, init_deque):
Base.input_from_text(self, init_deque)
self.val2 = init_deque.popleft()