## io_data() — create a new input parameters object

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

> This creates a new `io_data` object, with default parameters. You can, however, specify any of these parameters when you create the object:

> > `io = io_data(hetatm=True)`

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

> > `io.hetatm = True`

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

> > `env = environ()
> > env.io.hetatm = True`

> Please note that io_data.hetatm, io_data.hydrogen, io_data.convert_modres and io_data.water are ignored when reading `UHBD` files. When reading `CHARMM` files, io_data.hetatm and io_data.convert_modres are ignored.