"""
演示对序列进行切片操作
"""
# 对list进行切片,从1开始,4结束,步长1
my_list = [0, 1, 2, 3, 4, 5, 6]
result1 = my_list[1:4] # 步长默认是1,所以可以省略不写
print(f"结果1:{result1}")
# 对tuple进行切片,从头开始,到最后结束,步长1
my_tuple = (0, 1, 2, 3, 4, 5, 6)
result2 = my_tuple[:] # 起始和结束不写表示从头到尾,步长为1可以省略
print(f"结果2:{result2}")
# 对str进行切片,从头开始,到最后结束,步长2
my_str = "01234567"
result3 = my_str[::2]
print(f"结果3:{result3}")
# 对str进行切片,从头开始,到最后结束,步长-1
my_str = "01234567"
result4 = my_str[::-1] # 等同于将序列反转了
print(f"结果4:{result4}")
# 对列表进行切片,从3开始,到1结束,步长-1
my_list = [0, 1, 2, 3, 4, 5, 6]
result5 = my_list[3:1:-1]
print(f"结果5:{result5}")
# 对元组进行切片,从头开始,到尾结束,步长-2
my_tuple = (0, 1, 2, 3, 4, 5, 6)
result6 = my_tuple[::-2]
print(f"结果6:{result6}")