Default Argument Values: default value is evaluated only once,argumentevaluated,#This makes
文章由Byrx.net分享于2019-03-23 06:03:15
Default Argument Values: default value is evaluated only once,argumentevaluated,#This makes
#This makes a difference when the default is a mutable object such as a list, #dictionary, or instances of most classes. For example, the following function #accumulates the arguments passed to it on subsequent calls:def f(a, L=[]): L.append(a) return Lprint f(1)print f(2)print f(3)
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