Python的编译器错误，X不带任何参数（1提供） [英] Python compiler error, x takes no arguments (1 given)

问题描述

我正在写一小片蟒蛇作为家庭作业，而我没有得到它运行！我没有那么多的Python的经验，但我知道相当多的Java。
我试图实现粒子群算法，这里就是我有：

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，我看不出为什么这不应该工作。
然而，当我运行它，我得到这个错误：

Now, I see no reason why this shouldn't work. However, when I run it, I get this error:

类型错误：updateVelocity（）不带任何参数（1给出）

我不明白！我不会放弃的任何参数！

I don't understand! I'm not giving it any arguments!

感谢您的帮助，

莱纳斯

推荐答案

Python的隐含传递对象方法调用，但是你需要显式声明的参数吧。这是习惯上命名为自：

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):

这篇关于Python的编译器错误，X不带任何参数（1提供）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！