一、List定义

list_test = [‘z’, ‘y’, ‘p’]
print(list_test)

结果：
[‘z’, ‘y’, ‘p’]

二、List负数索引

list_test = [‘z’, ‘y’, ‘p’, ‘1998’, ‘09’, ‘09’, ‘sichuan’, ‘zizhong’, ‘23’]
print(list_test[-1]) # 输出最后一个元素
print(list_test[-4]) # 输出倒数第四个
print(list_test[0])
print(list_test[2])
print(list_test[:]) # 输出全部元素
print(list_test[1:4]) # 输出下标为1-4的元素，实际是第2-5个
print(list_test[4:-1]) # 实际效果为[4,-1)

结果：
F:\Pycharm_WorkSpace\菜鸟教程，Python实例\venv\Scripts\python.exe F:/Pycharm_WorkSpace/菜鸟教程，Python实例/16_List.py
23
09
z
p
[‘z’, ‘y’, ‘p’, ‘1998’, ‘09’, ‘09’, ‘sichuan’, ‘zizhong’, ‘23’]
[‘y’, ‘p’, ‘1998’]
[‘09’, ‘09’, ‘sichuan’, ‘zizhong’]

Process finished with exit code 0

三、List增加元素