Python学习--数据结构

#!/usr/bin/python
# -*- coding: utf-8 -*-
# Filename: dataStructure.py
# 数据结构

# 列表的基本操作
a = [3, 2, 34, 12.3]
print a
# 添加一个元素到列表后面
a.append(15)
print a
# 查看元素的位置
print a.index(34)
# 移除一个元素
a.remove(2)
print a
# 翻转列表
a.reverse()
print a
# 排序
a.sort()
print a

# 元组的基本操作，元组的值不会被改变
b = ("a", "b", "c")
print b
print len(b)
# 下标从0开始计算
print b[1] 

# 字典，一种键和值对应的数据结构，键是唯一的
c = {"a" : "aaa", "b" : "bbb", "c" : "ccc"}
print c
print c["a"]
del c["b"]
c["d"] = "ddd"
for name, value in c.items():
	print name, value
if "d" in c:
	print "d is in c"

# 列表，元组和字符串都是序列，序列的特点就是索引操作和切片操作
d = "world"
print d[0]
print d[1]
print d[-1]
e = ["a", "b", "c", "d"]
print e[:]
print e[1:2]
print e[0:-1]
print e[2:]

# 引用和复制
f = [1, 2, 3, 4]
# 引用，指向相同的内存块
g = f
print f
print g
del f[0]
print f
print g
# 复制
h = f[:]
del f[0]
print f
print h

# 更多字符串操作
i = "world"
if i.startswith("wor"):
	print "i is starts with 'wor'"
if "o" in i:
	print "'o' is in i"
if i.find("ld"):
	print "'ld' is found i"
# 使用分隔符分隔列表的值
delimiter = "_"
j = ["a", "b", "c"]
print delimiter.join(j)