python声明变量

在Python语言中，声明变量的同时需要为其赋值。这是因为在Python中，不允许存在没有被赋值的变量，因为这样的变量没有任何意义。变量在Python中的作用是为程序中的某个值起一个名字，类似于给人起名字一样，方便记忆和使用。因此，在声明变量时，必须为其赋一个初值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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