摘要： 条件： ①递归有最小值或有确定值 ②fun(x) = ax * bfun(x-1) 类似规则 eg. n! : ①1! = 1 ②n! = n* (n-1)! def factorial (n): if n==1: return 1 else:return n*factorial(n-1) eg. 阅读全文

摘要： These are the Boolean operations, ordered by ascending priority: Priority : () > and > or. not > and > or 1. x = 1, y = 2, ( x or y ) == 2 FALSE cause 阅读全文

摘要： id() copy() deepcopy() y=x 阅读全文