Python学习第二篇之tuple
Python学习第二篇之tuple
一、元组的值不能被修改
#!/usr/bin/python
tup =("a","b","c");
tup[1]=7
执行后出现如下错误：
Traceback (most recent call last):
File "C:\Program Files\Sublime Text 3\time.py", line 3, in
tup[1]=7
TypeError: 'tuple' object does not support item assignment
二、元组的元素不能单个删除，只能全部删除
#!/usr/bin/python
tup =("a","b","c");
del tup
print "After deleting tuple:\n"
print tup执行结果：After deleting tuple:
Traceback (most recent call last):
File "C:\Program Files\Sublime Text 3\time.py", line 6, in
print tup
NameError: name 'tup' is not defined
三、只有一个元素的元组圆括号必须有逗号，否则不会认为是元组
#!/usr/bin/python tupleone=(1,) print "tupleone is :",type(tupleone) tupleoneerror=(1) print "tupleanotherone is :",type(tupleoneerror)
执行结果;
tupleone is :
tupleanotherone is :
四、元组元素的拆分，定义变量
#!/usr/bin/python
myinfo=("jinhoward",30,"Male")
name,age,gender=myinfo
print "Name=",name
print "Age=",age
print "Gender=",gender执行结果：
Name= jinhoward
Age= 30
Gender= Male
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