Python_Built-in Types_list.extend

API文档：

array.extend(iterable)
Append items from iterable to the end of the array. If iterable is another array, it must have exactly the same type code; if not, TypeError will be raised. If iterable is not an array, it must be iterable and its elements must be the right type to be appended to the array.

翻译文档：

      参数：

             iterable：为一个数组或是string等

      描述：

            将iterable数组或是字符串追加到array中末尾。

            如果iterable为一个其他类型，则返回一个TypeError异常。如果iterable为字符串或是数组、元组等，则追加到array末尾

例子：

#! /usr/bin/env python
#coding=utf-8

list1=['a','b','c']
list2=['h','j']
print list1

list1.extend(list2)
print list1

list2=[1,'2']
list1.extend(list2)
print list1

list1.extend(1)
print list1

输出：

['a', 'b', 'c']
['a', 'b', 'c', 'h', 'j']
['a', 'b', 'c', 'h', 'j', 1, '2']
Traceback (most recent call last):
  File "F:\pyWorkSpace\notes\API\array_extend.py", line 15, in <module>
    list1.extend(1)
TypeError: 'int' object is not iterable