Python list 基础知识篇

list用方括号表示，比如

list=['tiger','cat','dog']

通过append()函数，可以向list的末尾增加元素

下面看个例子

suitcase = []
suitcase.append("sunglasses")

suitcase.append("hallo")
suitcase.append('123')
suitcase.append('1.234')

list_length = len(suitcase) # Set this to the length of suitcase

print "There are %d items in the suitcase." % (list_length)
print suitcase

list的切片，就不多写了，其他篇幅里面有

下面写一下list的检索

animals = ["ant", "bat","cat"]
print animals.index("bat")

1

同样，我们也可以插入元素到list里面，如下用insert()

animals.insert(1, "dog")
print animals

animals = ["ant","dog", "bat","cat"]

还有一个例子比较有代表性，如下

animals = ["aardvark", "badger", "duck", "emu", "fennec fox"]
duck_index = animals.index("duck")    # Use index() to find "duck"

animals.insert(duck_index,'cobra')# Your code here!

print animals # Observe what prints after the insert operation

然后还有删除元素的功能，如下

beatles = ["john","paul","george","ringo","stuart"]
beatles.remove("stuart")
print beatles
>> ["john","paul","george","ringo"]



再添加一个实例，多重list，就是list里面含list，怎么样迭代出来，一次性写出来的，没想到竟然写对了.......瞎猫碰到死老鼠，哈哈