*hi,* * * *Consider a list: a = [1,2,3]* * * *& a simple function, which when called it will append 100 to the list.* * * *def app(x):* * return x.append(100)* * * *p = app(a)* * * *now list holds appended value [1,2,3,100]* *but p is empty... why it is?* * * *please teach.*
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