Use of Tuple in Python

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>>> a = (1,2)	# a is a tuple

>>> a+1	# error

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

TypeError: can only concatenate tuple (not "int") to tuple

>>> a+(1,) # we have to make sure 1 is not an int or string

(1, 2, 1)

# same with following part

>>> a = (1,2,3)

>>> b = (2,3,4)

>>> a+b

(1, 2, 3, 2, 3, 4)

Tuple最特别在于

tuple元素不允许删除或修改，但是可以通过连接tuple来实现简介修改/或转置为list