列表、元组、字典

列表def append(self, p_object): 　　　　‘‘‘在列表末尾添加一个元素‘‘‘l2 = [20,40,70,100]l2.append(1)l2.append(2)l2.append(3)print(l2)[20, 40, 70, 100, 1, 2, 3]

def count(self, value):　　　　‘‘‘总计一个元素在列表中出现的次数‘‘‘

l2 = [20,40,70,100,20,70,80,20]print(l2.count(20))3

def extend(self, iterable):　　　　‘‘‘向列表里添加多个元素或另一个列表‘‘‘

#1l1 = [2,4,7,10]l2 = [20,40,70,100,20,70,80,20]l2.extend(l1)print(l2)[20, 40, 70, 100, 20, 70, 80, 20, 2, 4, 7, 10]#2

l2 = [20,40,70,100,20,70,80,20]l2.extend(‘qwer‘)print(l2)[20, 40, 70, 100, 20, 70, 80, 20, ‘q‘, ‘w‘, ‘e‘, ‘r‘]

def index(self, value, start=None, stop=None):　　　　　　‘‘‘返回列表中某个元素第一次出现时的索引值‘‘‘

l2 = [20,40,70,100,20,70,80,20]print(l2.index(100))3

def insert(self, index, p_object):　　　　　　‘‘‘向列表中插入一个元素，可以指定插入位置‘‘‘

l2 = [20,40,70,100,20,70,80,20]l2.insert(0,100)print(l2)[100, 20, 40, 70, 100, 20, 70, 80, 20]

def pop(self, index=None):　　　　　　‘‘‘删除列表中最后一个元素‘‘‘

l2 = [20,40,70,100,20,70,80,20]print(l2.pop())print(l2)20[20, 40, 70, 100, 20, 70, 80]

def remove(self, value):　　　　　　‘‘‘从开头开始查找删除匹配到的第一个元素‘‘‘

l2 = [20,40,70,100,20,70,80,20]l2.remove(20)print(l2)[40, 70, 100, 20, 70, 80, 20]

def reverse(self):　　　　　　‘‘‘把列表倒过来‘‘‘

l2 = [20,40,70,100,20,70,80,20]l2.reverse()print(l2)[20, 80, 70, 20, 100, 70, 40, 20]

def sort(self, cmp=None, key=None, reverse=False):　　　　　　‘‘‘列表排序，默认按从小到大排序‘‘‘

l2 = [20,40,70,100,20,70,80,20]l2.sort()print(l2)[20, 20, 20, 40, 70, 70, 80, 100]

元组 

def count(self, value):　　　　‘‘‘统计元组中元素出现的次数‘‘‘

tu = (1,2,3,4,5,11,22,33,44,55,66,1,2,3,4,5,6,1)print(tu.count(1))3

def index(self, value, start=None, stop=None):　　　　‘‘‘显示元组中指定元素第一次出现的索引‘‘‘

tu = (1,2,3,4,5,11,22,33,44,55,66,1,2,3,4,5,6,1)print(tu.index(5))4

字典

def clear(self):　　　　‘‘‘清除字典里所有元素‘‘‘

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic.clear()print(dic){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}{}

def copy(self):　　　　‘‘‘复制字典‘‘‘

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.copy()print(dic2){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}{1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}

def get(self, k, d=None):　　　　‘‘‘根据key得到对应的值‘‘‘

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.get(2)print(dic2)

{1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}st

def items(self):

　　　　""" 所有项的列表形式 """

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.items()print(dic2){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}dict_items([(1, ‘大唐‘), (2, ‘st‘), (3, ‘fc‘)])

def keys(self):

　　　　　　""" 字典所有的key列表 """

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.keys()print(dic2){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}dict_keys([1, 2, 3])

def pop(self, k, d=None):　　　　　　‘‘‘获取并移除字典中一对元素‘‘‘

dic = {        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.pop(2)print(dic2)print(dic){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}st{1: ‘大唐‘, 3: ‘fc‘}

def popitem(self):　　　　　　‘‘‘获取并一处字典中第一对元素‘‘‘

dic = {        0:‘长安‘,        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.popitem()print(dic2)print(dic)

{0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}(0, ‘长安‘){1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}

def setdefault(self, k, d=None):　　　　　　　　‘‘‘如果key不存在，则创建，如果存在，则返回已存在的值且不修改‘‘‘dic = {        0:‘长安‘,        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.setdefault(4)print(dic2)print(dic){0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}None{0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘, 4: None}

def update(self, E=None, **F):　　　　　　　　‘‘‘更新，可以将一个字典追加到另一个字典里面‘‘‘　　

dic = {        0:‘长安‘,        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}dic1 = {        ‘A‘:‘飞燕女‘,        ‘B‘:‘逍遥生‘,        ‘C‘:‘玄彩娥‘}print(dic)dic2 = dic.update(dic1)print(dic2)print(dic)

{0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}None{0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘, ‘B‘: ‘逍遥生‘, ‘C‘: ‘玄彩娥‘, ‘A‘: ‘飞燕女‘}

def values(self):　　　　　‘‘‘列出字典中所有值‘‘‘dic = {        0:‘长安‘,        1:‘大唐‘,        2:‘st‘,        3:‘fc‘}print(dic)dic2 = dic.values()print(dic2)print(dic

{0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}dict_values([‘长安‘, ‘大唐‘, ‘st‘, ‘fc‘]){0: ‘长安‘, 1: ‘大唐‘, 2: ‘st‘, 3: ‘fc‘}