Python -- list 类

python list类常用方法

class list(object):

    def append(self, p_object): # 向列表中添加元素；

>>> name_list

['shuoming', 'Python', 'search']

>>> name_list.append("python")

>>> name_list

['shuoming', 'python', 'search', 'python']

    def clear(self):       # 清除列表所有元素，清除后列表为空列表；

>>> test_list

['shuoming', 'python', 'search', 'python', 'automatic', 1, 2]

>>> test_list.clear()

>>> test_list

[]

>>>

    def copy(self):      

    def count(self, value):    # 列表中指定元素的个数；

>>> name_list.count("python")

2

    def extend(self, iterable):   把一个列表添加到另一个列表中；

>>> a

[1, 7, 2, 9, 3, 8, 'a', 'b']

>>> b=[2,'f',3]

>>> a+b

[1, 7, 2, 9, 3, 8, 'a', 'b', 2, 'f', 3]

>>> a.extend(b)

>>> a

[1, 7, 2, 9, 3, 8, 'a', 'b', 2, 'f', 3]

>>> 

    def index(self, value, start=None, stop=None):   # 查列表中某一元素第一个索引值；

>>> name_list.index("python")

1

    def insert(self, index, p_object):   # 向列表中插入某一元素；

>>> name_list.insert(3,"python")

>>> name_list

['shuoming', 'python', 'search', 'python', 'python']

    def pop(self, index=None):   # 从列表最后删除元素；

>>> last_one = name_list.pop()  

>>> last_one

'python'

>>> name_list

['shuoming', 'python', 'search', 'python']

    def remove(self, value):   # 删除某一元素，默认是指定元素的第一个值；

>>> name_list.remove('python')

>>> name_list

['shuoming', 'search', 'python']

    def reverse(self):      #  翻转；

>>> name_list

['shuoming', 'search', 'python', '@', '$']

>>> name_list.reverse()

>>> name_list

['$', '@', 'python', 'search', 'shuoming']

    def sort(self, key=None, reverse=False):   # 排序，特殊字符在前；

>>> name_list

['shuoming', 'search', 'python',  '@', '$']

>>> name_list.sort()

>>> print (name_list)

['$', '@', 'python', 'search', 'shuoming']