1

Can someone explain to me my why this is an invalid syntax? It comes in the line before the last line.

import random

class BernoulliArm():

    def __init__(self, p):
         self.p=p

    def draw(self):
        if random.random()>self.p:
            return 0.0
        else:
            return 1.0

means = [0.1, 0.1, 0.1, 0.1, 0.9]
n_arms = len(means)
random.shuffle(means)    

arms = map(lambda (mu):BernoulliArm(mu), means)    
arms[0].draw()
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1 Answer 1

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2

In Python, lambda does not use parentheses around the parameter names:

arms = map(lambda mu: BernoulliArm(mu), means)
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