函式編程模組
************

The modules described in this chapter provide functions and classes
that support a functional programming style, and general operations on
callables.

本章包含下列的模組：

* "itertools" --- Functions creating iterators for efficient looping

  * Itertool functions

  * Itertools Recipes

* "functools" --- Higher-order functions and operations on callable
  objects

  * "partial" 物件

* "operator" --- 標準運算子替代函式

  * 運算子與函式間的對映

  * 原地 (in-place) 運算子
