Python解释器错误,x不带参数(给定1个) [英] Python interpreter error, x takes no arguments (1 given)
问题描述
我正在写一小段python作为作业,但我没有让它运行!我没有太多的Python经验,但是我知道很多Java. 我正在尝试实现粒子群优化算法,这就是我所拥有的:
I'm writing a small piece of python as a homework assignment, and I'm not getting it to run! I don't have that much Python-experience, but I know quite a lot of Java. I'm trying to implement a Particle Swarm Optimization algorithm, and here's what I have:
class Particle:
def __init__(self,domain,ID):
self.ID = ID
self.gbest = None
self.velocity = []
self.current = []
self.pbest = []
for x in range(len(domain)):
self.current.append(random.randint(domain[x][0],domain[x][1]))
self.velocity.append(random.randint(domain[x][0],domain[x][1]))
self.pbestx = self.current
def updateVelocity():
for x in range(0,len(self.velocity)):
self.velocity[x] = 2*random.random()*(self.pbestx[x]-self.current[x]) + 2 * random.random()*(self.gbest[x]-self.current[x])
def updatePosition():
for x in range(0,len(self.current)):
self.current[x] = self.current[x] + self.velocity[x]
def updatePbest():
if costf(self.current) < costf(self.best):
self.best = self.current
def psoOptimize(domain,costf,noOfParticles=20, noOfRuns=30):
particles = []
for i in range(noOfParticles):
particle = Particle(domain,i)
particles.append(particle)
for i in range(noOfRuns):
Globalgbest = []
cost = 9999999999999999999
for i in particles:
if costf(i.pbest) < cost:
cost = costf(i.pbest)
Globalgbest = i.pbest
for particle in particles:
particle.updateVelocity()
particle.updatePosition()
particle.updatePbest(costf)
particle.gbest = Globalgbest
return determineGbest(particles,costf)
现在,我认为没有理由不起作用. 但是,当我运行它时,出现此错误:
Now, I see no reason why this shouldn't work. However, when I run it, I get this error:
"TypeError:updateVelocity()不接受任何参数(给定1个)"
我不明白!我没有给它任何参数!
I don't understand! I'm not giving it any arguments!
感谢您的帮助,
鼻窦
推荐答案
Python隐式将对象传递给方法调用,但是您需要为其显式声明参数.通常将其命名为self
:
Python implicitly passes the object to method calls, but you need to explicitly declare the parameter for it. This is customarily named self
:
def updateVelocity(self):
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