## Codelist


A controlled terminology / value set from an external standard.


Usage

``` python
Codelist(
    name,
    codes=list(),
    label=None,
    version=None,
    source=None,
    extensible=False
)
```


Represents a set of permitted values from standards like CDISC controlled terminology, SPSS value labels, DDI code schemes, etc.


## Parameters


`name: str`  
Codelist identifier.

`codes: list[CodelistEntry] = list()`    
List of codelist entries.

`label: str | None = None`  
Human-readable name for the codelist.

`version: str | None = None`  
Version of the terminology.

`source: str | None = None`  
Where this codelist comes from (e.g., `"CDISC CT 2024-09"`).

`extensible: bool = ``False`  
Whether additional values beyond the codelist are allowed.


## Methods

| Name | Description |
|----|----|
| [to_dict()](#to_dict) | Get a value → label mapping. |
| [to_set()](#to_set) | Get the list of valid values (for col_vals_in_set). |

------------------------------------------------------------------------


#### to_dict()


Get a value → label mapping.


Usage

``` python
to_dict()
```


##### Returns


`dict`  
Mapping of value to human-readable label.


------------------------------------------------------------------------


#### to_set()


Get the list of valid values (for col_vals_in_set).


Usage

``` python
to_set()
```


##### Returns


`list`  
All non-deprecated values in the codelist.