## energy_data() — create a new set of objective function parameters

`energy_data(copy=None, **kwargs)`

> This creates a new `energy_data` object. The object will have the default parameters. You can, however, specify any of these parameters when you create the object:

> > `edat = energy_data(contact_shell=7.0)`

> Alternatively, you can set parameters in an existing object:

> > `edat.contact_shell = 7.0`

> Many commands use `energy_data` objects. However, for convenience, the `environ` class also contains an `energy_data` object, as environ.edat. This is used as the default if you do not give an `energy_data` parameter, so you can set this to change the objective function used by all functions:

> > `env = environ()
> > env.edat.contact_shell = 7.0`