python高级特性与高阶函数

######高阶特性######  1. 递归函数  # # n! = 1x2x3x4x.......(n-1)xn= (n-1)!xn = (n-2)!x(n-1)xn # # 1!    =     1 # 2!    =     (2-1)! x 2                      =    fact(2-1) x 2 # 3!    =     (3-1)! x 3  = (2-

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