我有 2 个同一个类（State）的实例（st0，st1），其中有 2 个方法。不知何故当st0。loc_st()被调用，我想要那个st1。rem_st()被自动触发。如何使用 Python OOP 实现该目的？对不起，代码看起来有点幼稚，但它是一个简化的模型，节省了阅读工作。
import random
class State(object):
def __init__(self) -> None:
self.s = ['S0', 'S1', 'S2']
def loc_sc(self):
# how to trigger a remote method in different class?
print (self.s)
def rem_sc(self):
random.shuffle(self.s)
print (self.s)
if __name__ == '__main__':
st0 = State()
st1 = State()
# how can I trigger st1.rem_sc() automatically
# when st0.loc_sc is called
st0.loc_sc()
如果您希望调用每个实例的方法，您只需向类中添加一个列表并遍历所有实例并调用它们的方法：
import random
class State(object):
instances = []
def __init__(self) -> None:
self.in_trigger = 0
self.ex_trigger = 0
self.s = ['S0', 'S1', 'S2']
State.instances.append(self)
def loc_sc(self):
# how to trigger a remote method in different class?
print (self.s)
for i in State.instances:
i.rem_sc()
def rem_sc(self):
if self.ex_trigger:
random.shuffle(self.s)
print (self.s)
if __name__ == '__main__':
st0 = State()
st1 = State()
st0.loc_sc()
或者您可以将实例数组添加到类构造函数中。当在实例上调用该方法时，您可以遍历该数组中的所有实例并调用该方法：
import random
class State(object):
def __init__(self, instances=[]) -> None:
self.in_trigger = 0
self.ex_trigger = 0
self.s = ['S0', 'S1', 'S2']
self.instances = instances
def loc_sc(self):
# how to trigger a remote method in different class?
print(self.s)
for i in self.instances:
i.rem_sc()
def rem_sc(self):
if self.ex_trigger:
random.shuffle(self.s)
print (self.s)
if __name__ == '__main__':
st1 = State()
st0 = State([st1])
st0.loc_sc()
如果您想先初始化 st0，您可以向该类添加一个 addInstance 方法，该方法会将一个实例添加到该实例的实例数组中：
import random
class State(object):
def __init__(self, instances=[]) -> None:
self.in_trigger = 0
self.ex_trigger = 0
self.s = ['S0', 'S1', 'S2']
self.instances = instances
def loc_sc(self):
# how to trigger a remote method in different class?
print(self.s)
for i in self.instances:
i.rem_sc()
def rem_sc(self):
if self.ex_trigger:
random.shuffle(self.s)
print (self.s)
def addInstance(self, instance):
self.instances.append(instance)
if __name__ == '__main__':
st0 = State()
st1 = State()
st0.addInstance(st1)
st0.loc_sc()
或者您也可以添加对构造函数的引用，以便将实例本身添加到该引用的实例中。
import random
class State(object):
def __init__(self, reference=None) -> None:
self.in_trigger = 0
self.ex_trigger = 0
self.s = ['S0', 'S1', 'S2']
self.instances = []
if reference != None: reference.instances.append(self)
def loc_sc(self):
# how to trigger a remote method in different class?
print(self.s)
for i in self.instances:
i.rem_sc()
def rem_sc(self):
if self.ex_trigger:
random.shuffle(self.s)
print (self.s)
if __name__ == '__main__':
st0 = State()
st1 = State(st0)
st0.loc_sc()
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