我有一个类 Particle,它有一些参数和属性,如下所示。但是,当它到达位置的函数setter时,并且执行copy()函数时,出现错误信息:RuntimeError: maximum recursion depth exceeded while calling a Python object。我尝试了不同的选项,比如deepcopy()或import sys sys.setrecursionlimit(10000),但都没有奏效……有人有什么想法吗?这是我的代码:
def initCost(n):
a = random.randint(0,10) #gram.
b = random.randint(0,5) #price
return [random.randint(0,a*b) for i in range(n)]
costs = initCost(10)
class Particle:
def __init__(self, n, maxWeight):
self.position = [random.randint(0,1) for i in range(n)] #position
self.velocity = [0 for i in range(n)] #velocity
#self.fit = self.fitness(self.position)
self.bp = self.position.copy() #best position
self.bf = self.fit #best fitness
self.evaluate()
def fit(self, x):
fitt = 0
for i in range(len(x)-1):
if (x[i] == 1):
fitt = fitt + costs[i]
return fitt
def evaluate(self):
""" evaluates the particle """
self.fitness = self.fit(self.position)
@property
def position(self):
return self.position
@property
def bp(self):
return self.bp
@property
def bf(self):
return self.bf
@position.setter
def position(self, newPosition):
self.position = newPosition.copy()
#self.position = newPosition[:]
self.evaluate()
# automatic update of particle's memory
if (self.fit<self.bf):
self.bp = self.position
self.bf = self.fit
self.position
引用绑定到一个list
。 - TigerhawkT3