Python学习笔记（二）

标签：python   编程语言   

一、列表基本定义

列表是序列式的数据类型，可以通过下标来访问列表中的某一个元素或者一些元素。它可以保存任何数目、任意对象类型的非常灵活的容器。

alist = [123, 1.23, 'abc', [1, a]]

name = ["Avata", "Titannic", "The Dark Knight Rises", "Jurassic Park", "Dances with Wolves"]
year = [2009, 1997, 2012, 1997, 1990]
directors = ["James Cameron", 
            "James Cameron", 
            "Christopher Nolan", 
            "Steven Spielberg", 
            "Kevin Costner"]
			
print name[0]
print name[1]
print name[-1]
print name[-3]
print name[-1][0]
print name[1:3]
print name[:2]
print name[1:]
					
avata = ["Avata", 2009, "James Cameron"]
titannic = ["Titannic", 1997, "James Cameron"]
theDarkKnightRises = ["The Dark Knight Rises", 2012, "Christopher Nolan"]
jurassicPark  = ["Jurassic Park", 1997, "Steven Spielberg"]
dancesWithWolves = ["Dances with Wolves", 1990, "Kevin Costner"]

二、列表的增减改删

name = ["Lili",
            "A3",
            "Tom",
            "Meta",
            "Jack"]
name.append("Joy")
print name
othername = ["Frank",
              "Jim"]
print name
print othername
name.extend(othername)
print name
name.insert(1,"Bob")
print name

name = ["Lili",
            "A3",
            "Tom",
            "Meta",
            "Jack"]
del name[2]
print name
name.remove("Jack")
print name
del name
print name

name[2] = "Tim"

list1 = [1, 2, 3]
list2 = ["a", "b", "c"]
list3 = list1 + list2
print list3
list1.extend(list2)
print list1
list1 = list1 * 2
print list1
list2 = list2 * 3
print list2
a = "@"
h = "_"
h *= 3
print a,h,a

三、列表的迭代

names = ["Lili",
            "A3",
            "Tom",
            "Meta",
            "Jack"]
for name in names:
    print name
print [name for name in names]
print [letter for name in names for letter in name[0]]

for name in names：
	for letter in name[0]：
		print letter

Python学习笔记（二）

标签：python   编程语言   

原文地址：http://blog.csdn.net/sin_geek/article/details/40979069