列表是什么？

列表是用中括号括起来的一组数据，列表中的值为表项，以逗号分隔开来

Season = ['Spring','Summer','Autumn','Winder']
print(Season)

运行结果如下

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

['Spring', 'Summer', 'Autumn', 'Winder']

Process finished with exit code 0

用下标获取列表中的单个值

列表中的每项，对应的下标从零开始，依次递增，也可以以负数的形式存在，如-1表示倒数第一个元素，-2表示到时第二个元素

Season = ['Spring','Summer','Autumn','Winder']
print(Season)

print(Season[0])
print(Season[1])
print(Season[2])
print(Season[3])
print(Season[-1])
print(Season[-2])
print(Season[-3])
print(Season[-4])

运行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

['Spring', 'Summer', 'Autumn', 'Winder']

Spring

Summer

Autumn

Winder

Winder

Autumn

Summer

Spring

Process finished with exit code 0

用len（）方法获取列表的长度

Season = ['Spring','Summer','Autumn','Winder']
print(len(Season))

运行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

4

修改列表中项的值

Season = ['Spring','Summer','Autumn','Winder']
print(Season)

Season[0] = "春天"
Season[2] = "秋天"
print(Season)
print("----")

运行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

['Spring', 'Summer', 'Autumn', 'Winder']

['春天', 'Summer', '秋天', 'Winder']

----

列表连接和列表复制

+操作符可以连接两个列表，得到一个新列表

*操作符可以用于一个列表和一个整数，实现列表的复制。

Season_English = ['Spring' , 'Summer' , 'Autumn' , 'Winder']
Season_Chinese = ['春天','夏天','秋天','冬天']

print(Season_English)
print(Season_Chinese)
print(Season_English + Season_Chinese)
print(Season_English * 2)
print("------------------------------------------------------------")

执行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

['Spring', 'Summer', 'Autumn', 'Winder']

['春天', '夏天', '秋天', '冬天']

['Spring', 'Summer', 'Autumn', 'Winder', '春天', '夏天', '秋天', '冬天']

['Spring', 'Summer', 'Autumn', 'Winder', 'Spring', 'Summer', 'Autumn', 'Winder']

------------------------------------------------------------

用del删除列表中的某项

Season_Chinese = ['春天','夏天','秋天','冬天']

print(Season_English)
print(Season_Chinese)
del(Season_English[1])
print(Season_English)
print("------------------------------------------------------------")

执行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

['Spring', 'Summer', 'Autumn', 'Winder']

['春天', '夏天', '秋天', '冬天']

['Spring', 'Autumn', 'Winder']

------------------------------------------------------------

in和not in操作符，判断列表中是否包含某个数据

Season_English = ['Spring' , 'Summer' , 'Autumn' , 'Winder']
Season_Chinese = ['春天','夏天','秋天','冬天']

Result = '春天' in Season_Chinese
print(Result)
Result = '春天' in Season_English
print(Result)

print("------------------------------------------------------------")

运行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

True

False

用index方法获取列表中对应项的索引

Season_English = ['Spring' , 'Summer' , 'Autumn' , 'Winder']
Season_Chinese = ['春天','夏天','秋天','冬天']
print((Season_Chinese).index('夏天'))
print("------------------------------------------------------------")

运行结果如下：

D:\Python_Test\Scripts\python.exe C:/Users/LynnXue/PycharmProjects/pythonProject1/DateDo.py

1

------------------------------------------------------------

用 append()和 insert()方法在列表中添加值

用 remove()方法从列表中删除值

用 sort()方法将列表中的值排序