元组的定义、元组与列表的区别----python基础学习

dimensions = (200, 50)
❷ print(dimensions[0])
print(dimensions[1])
个人理解：
元组用圆括号，列表用方括号
元组：内容固定，用如下代码会报错
dimensions = (200, 50)
❶ dimensions[0] = 250
修改元组可用修改元组变量的方法：
❶ dimensions = (200, 50)
print(“Original dimensions:”)
for dimension in dimensions:
print(dimension)
❷ dimensions = (400, 100)
❸ print("\nModified dimensions:")
for dimension in dimensions:
print(dimension)