# EqualityConstraint

Source: https://www.tensorplay.cn/docs/generated/tensorplay.export.EqualityConstraint.html

```python
class tensorplay.export.EqualityConstraint(sites: tuple[tuple[str, int], ...], name: str | None = None)
```

Ties several input sites to one shared dimension size.

sites lists every (input placeholder name, dim index) pair whose
runtime sizes must stay equal; name is the symbolic dimension they
implement when the tie comes from a shared [Dim](/docs/generated/tensorplay.export.Dim.html#tensorplay.export.Dim), else None.