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POPython compiler error, x takes no arguments (1 given)
 

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  1. POPython compiler error, x takes no arguments (1 given)
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    <p>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: </p> <pre><code>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) &lt; 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) &lt; 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) </code></pre> <p>Now, I see no reason why this shouldn't work. However, when I run it, I get this error:</p> <p><strong>"TypeError: updateVelocity() takes no arguments (1 given)"</strong></p> <p>I don't understand! I'm not giving it any arguments!</p> <p>Thanks for the help,</p> <p>Linus</p>
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    1. COPlease highlight your code and click the "010101" button to format it properly.
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    2. COThere's no blank lines in my source, that's just the way this site formats it.
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    3. COLow quality question: many unrelated code with many syntax errors due to mixed spaces and tabs. Duplicate of better question http://stackoverflow.com/q/6614123/448474
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