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# `EXDADRConvergenceMethod`
Last update: 09.03.2026
#### *class* Ansys.Mechanical.DataModel.Enums.EXDADRConvergenceMethod(\*args, \*\*kwds)
Bases: [`enum.Enum`](https://docs.python.org/3/library/enum.html#enum.Enum)
Create a collection of name/value pairs.
Example enumeration:
```pycon
>>> class Color(Enum):
... RED = 1
... BLUE = 2
... GREEN = 3
```
Access them by:
- attribute access:
```pycon
>>> Color.RED
```
- value lookup:
```pycon
>>> Color(1)
```
- name lookup:
```pycon
>>> Color['RED']
```
Enumerations can be iterated over, and know how many members they have:
```pycon
>>> len(Color)
3
```
```pycon
>>> list(Color)
[, , ]
```
Methods can be added to enumerations, and members can have their own attributes – see the documentation for details.
## Overview
### Attributes
Name[`CentralDifferenceMethod`](#EXDADRConvergenceMethod.CentralDifferenceMethod)[`ProgramControlled`](#EXDADRConvergenceMethod.ProgramControlled)[`RunningAverageMethod`](#EXDADRConvergenceMethod.RunningAverageMethod)
## Attribute detail
### EXDADRConvergenceMethod.CentralDifferenceMethod *= 1*
### EXDADRConvergenceMethod.ProgramControlled *= 0*
### EXDADRConvergenceMethod.RunningAverageMethod *= 2*