python元组

元组的创建

用使用（）

dimensions = (200, 50)  #定义元组dimensions用括号


print(dimensions[0])   #输出第一个
print(dimensions[1])    #输出第二个
=>
200
50

尝试修改元组中的元素(会报错)

dimensions[0] = 250
=>
Traceback (most recent call last):
  File "D:/腾讯软件/pythonfile/study/tuple.py", line 8, in <module>
    dimensions[0] = 250
TypeError: 'tuple' object does not support item assignment

可以修改元组变量

print("dimensions")
for dimension in dimensions:
    print(dimensions)

dismensions = (400, 100)   #将一个的新元组存储到变量dimensions中
print("dismensions")
for dimension in dimensions:
    print(dimension)
=>
dimensions
200
50
dismensions
400
100

循环元组

for dimension in dimensions:
    print(dimension)
 =>
 200
50