Python method parameter list

Question

in a method definition why would someone set the formal parameter amount equal to the constant PERMANENCE_INC in the formal parameter list?

def increasePermanence(self, amount=PERMANENCE_INC): 
    """ Increases the permanence of this synapse. """ 
    self.permanence = min(1.0, self.permanence+amount)

Jari · Accepted Answer · 2012-07-02 05:28:23Z

2

That gives default value for the parameter in case it is not provided when the function is called.

For example, to increase permanence by default value, you would call:

obj.increasePermanence()

answered Jul 2, 2012 at 5:28

Jari

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Howard · Accepted Answer · 2012-07-02 05:27:35Z

0

This form makes amount an optional argument with a default value of PERMANENCE_INC.

answered Jul 2, 2012 at 5:27

Howard

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