吴裕雄--天生自然 PYTHON3开发学习：列表

list1 = ['Google', 'Runoob', 1997, 2000];
list2 = [1, 2, 3, 4, 5 ];
list3 = ["a", "b", "c", "d"];

list1 = ['Google', 'Runoob', 1997, 2000];
list2 = [1, 2, 3, 4, 5, 6, 7 ];

print ("list1[0]: ", list1[0])
print ("list2[1:5]: ", list2[1:5])

list = ['Google', 'Runoob', 1997, 2000]

print ("第三个元素为 : ", list[2])
list[2] = 2001
print ("更新后的第三个元素为 : ", list[2])

list = ['Google', 'Runoob', 1997, 2000]

print ("原始列表 : ", list)
del list[2]
print ("删除第三个元素 : ", list)

list1 = ['Google', 'Runoob', 'Taobao']
print (len(list1))
list2=list(range(5)) # 创建一个 0-4 的列表
print (len(list2))

list1, list2 = ['Google', 'Runoob', 'Taobao'], [456, 700, 200]

print ("list1 最大元素值 : ", max(list1))
print ("list2 最大元素值 : ", max(list2))

list1, list2 = ['Google', 'Runoob', 'Taobao'], [456, 700, 200]

print ("list1 最小元素值 : ", min(list1))
print ("list2 最小元素值 : ", min(list2))

aTuple = (123, 'Google', 'Runoob', 'Taobao')
list1 = list(aTuple)
print ("列表元素 : ", list1)

str="Hello World"
list2=list(str)
print ("列表元素 : ", list2)

list1 = ['Google', 'Runoob', 'Taobao']
list1.append('Baidu')
print ("更新后的列表 : ", list1)

aList = [123, 'Google', 'Runoob', 'Taobao', 123];

print ("123 元素个数 : ", aList.count(123))
print ("Runoob 元素个数 : ", aList.count('Runoob'))

list1 = ['Google', 'Runoob', 'Taobao']
list2=list(range(5)) # 创建 0-4 的列表
list1.extend(list2)  # 扩展列表
print ("扩展后的列表：", list1)

# 语言列表
language = ['French', 'English', 'German']

# 元组
language_tuple = ('Spanish', 'Portuguese')

# 集合
language_set = {'Chinese', 'Japanese'}

# 添加元组元素到列表末尾
language.extend(language_tuple)

print('新列表: ', language)

# 添加集合元素到列表末尾
language.extend(language_set)

print('新列表: ', language)

list1 = ['Google', 'Runoob', 'Taobao']
print ('Runoob 索引值为', list1.index('Runoob'))
print ('Taobao 索引值为', list1.index('Taobao'))

list1 = ['Google', 'Runoob', 'Taobao']
list1.insert(1, 'Baidu')
print ('列表插入元素后为 : ', list1)

list1 = ['Google', 'Runoob', 'Taobao']
list1.pop()
print ("列表现在为 : ", list1)
list1.pop(1)
print ("列表现在为 : ", list1)

list1 = ['Google', 'Runoob', 'Taobao', 'Baidu']
list1.remove('Taobao')
print ("列表现在为 : ", list1)
list1.remove('Baidu')
print ("列表现在为 : ", list1)

list1 = ['Google', 'Runoob', 'Taobao', 'Baidu']
list1.reverse()
print ("列表反转后: ", list1)

aList = ['Google', 'Runoob', 'Taobao', 'Facebook']

aList.sort()
print ( "List : ", aList)

# 列表
vowels = ['e', 'a', 'u', 'o', 'i']

# 降序
vowels.sort(reverse=True)

# 输出结果
print ( '降序输出:', vowels )

# 获取列表的第二个元素
def takeSecond(elem):
    return elem[1]

# 列表
random = [(2, 2), (3, 4), (4, 1), (1, 3)]

# 指定第二个元素排序
random.sort(key=takeSecond)

# 输出类别
print ('排序列表：', random)

list1 = ['Google', 'Runoob', 'Taobao', 'Baidu']
list1.clear()
print ("列表清空后 : ", list1)

list1 = ['Google', 'Runoob', 'Taobao', 'Baidu']
list2 = list1.copy()
print ("list2 列表: ", list2)