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# -*- coding:utf-8 -*-

__author__ = 'gjw'

__time__ = '2018/1/11 0011 下午 1:59'

# 题目：列表使用实例。

# list

# 新建列表

testList = [10086, '中国移动', [1, 2, 4, 5]]

# 访问列表长度

print(len(testList))

# 到列表结尾

print(testList[1:])

# 向列表添加元素

testList.append('i\'m new here!')

print(len(testList))

print(testList[-1])

# 弹出列表的最后一个元素

print(testList.pop(1))

print(len(testList))

print(testList)

# list comprehension

# 后面有介绍，暂时掠过

matrix = [[1, 2, 3],

[4, 5, 6],

[7, 8, 9]]

print(matrix)

print(matrix[1])

col2 = [row[1] for row in matrix] # get a column from a matrix

print(col2)

col2even = [row[1] for row in matrix if row[1] % 2 == 0] # filter odd item

print(col2even)