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# The {mod}`~pyrealm.constants` module

```{eval-rst}
.. automodule:: pyrealm.constants
    :members:
```

## The ConstantsClass base class

```{eval-rst}
.. autoclass:: pyrealm.constants.base.ConstantsClass
    :members:
```

## Core constants

```{eval-rst}
.. autoclass:: pyrealm.constants.core_const.CoreConst
    :members:
```

## P Model constants

```{eval-rst}
.. autoclass:: pyrealm.constants.pmodel_const.PModelConst
    :members:
```

## T Model traits

```{eval-rst}
.. autoclass:: pyrealm.constants.tmodel_const.TModelTraits
    :members:
```

## Isotopic discrimination constants

```{eval-rst}
.. autoclass:: pyrealm.constants.isotope_const.IsotopesConst
    :members:
```

## C3/C4 competition constants

```{eval-rst}
.. autoclass:: pyrealm.constants.competition_const.C3C4Const
    :members:
```

## Two leaf model constants

```{eval-rst}
.. autoclass:: pyrealm.constants.two_leaf.TwoLeafConst
    :members:
```

## Phenology constants

```{eval-rst}
.. autoclass:: pyrealm.constants.phenology_const.PhenologyConst
    :members:
```