# 内置程序

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## id！

返回对象的唯一标识号。
尽管在纯 Erg 语义中，结构相同的对象之间没有区别，但实际上对象在内存中具有不同的位置。
`id!` 返回一个代表这个位置的数字。

```python
```

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