python学习笔记（三）之变量和字符串

　　在其他语言中，变量就是有名字的存储区，可以将值存储在变量中，也即内存中。在Python中略有不同，python并不是将值存储在变量中，更像是把名字贴在值上边。所以，有些python程序员会说python没有变量，只有名字。

 简单实践：

 1 >>>teacher = 'zengan'
 2 >>>print(teacher)
 3 >>>teacher = 'pandan'　
 4 >>>print(teacher)　
 5 >>>first = 3
 6 >>>second = 8
 7 >>>third = first + second
 8 >>>print(third) 
 9 >>>myteacher = 'zengan'
10 >>>yourteacher = 'zengbi'
11 >>>ourteacher = myteacher + yourteacher
12 >>>print(ourteacher)

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