面试题之题目汇总

"""
def func(a1,a2=[]):
    a2.append(a1)
    print(a2)


func(1) # [1,4]     [1,]
func(3,[]) # [3,]   [3,]
func(4) # [1,4]     [1,4]

def func(a1,a2=[]):
    a2.appe