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ex38.py
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ex38.py
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#coding:utf-8
#################
# 习题38:列表的操作
#################
# 前言
#
# 在对list操作的时候,python的工作原理:
# mystuff.append('hello')
# 实际上是mystuff.append(mystuff,'hello')
ten_things = "Apples Oranges Crows Telephone Light Sugar"
print "Wait there's not 10 things in that list, let's fix that."
stuff = ten_things.split(' ')
more_stuff = ["Day", "Night", "Song", "Frisbee", "Corn", "Banana", "Girl", "Boy"]
while len(stuff) != 10:
next_one = more_stuff.pop()
print "Adding: ", next_one
stuff.append(next_one)
print "There's %d items now." % len(stuff)
print "There we go: ", stuff
print "Let's do some things with stuff."
print stuff[1]
print stuff[-1] # 列表倒数第一个元素
print stuff.pop() # 列表最后一个元素移除
print " ".join(stuff) # 意思为用...连接stuff
print len(stuff) # join函数没有增加元素,只是输出时加入了''中的符号
print '#'.join(stuff[3:5) # [3:5]是第三个和第四个元素(要头不要尾)
# 笔记
#
# dir(something)
# 使用内置的dir()函数列出一个定义对象的标识符。例如,对于一个模块,包括在模块中定义的函数,类和变量。
# 当你给dir()提供一个模块名字时,它返回在那个模块中定义的名字的列表。当没有为其提供参数时, 它返回当前模块中定义的名字的列表。