# otp.ops.name_value_pair_add

### name_value_pair_add(name, value, , pairs=None)

Add `name=value` pair to a comma-separated list of `pairs`.

* **Parameters:**
  * **name** (str, [`Operation`](https://docs.pip.distribution.sol.onetick.com/api/operation/root.html.md#onetick.py.Operation))
  * **value** (str, [`Operation`](https://docs.pip.distribution.sol.onetick.com/api/operation/root.html.md#onetick.py.Operation))
  * **pairs** (str, [`Operation`](https://docs.pip.distribution.sol.onetick.com/api/operation/root.html.md#onetick.py.Operation)) -- If not set, then new string is created.
* **Return type:**
  [`Operation`](https://docs.pip.distribution.sol.onetick.com/api/operation/root.html.md#onetick.py.Operation)

### Examples

Creating a list of pairs and adding a new pair:

```pycon
>>> data = otp.Tick(A=otp.ops.name_value_pair_add('a', '1'))
>>> data['B'] = otp.ops.name_value_pair_add('b', '2', data['A'])
>>> otp.run(data)
        Time    A        B
0 2003-12-01  a=1  a=1,b=2
```

#### SEE ALSO
**NAME_VALUE_PAIR_ADD** OneTick function
<br/>
[`name_value_pair_modify()`](https://docs.pip.distribution.sol.onetick.com/api/functions/string/name_value_pair_modify.html.md#onetick.py.ops.name_value_pair_modify)
<br/>
[`name_value_pair_remove()`](https://docs.pip.distribution.sol.onetick.com/api/functions/string/name_value_pair_remove.html.md#onetick.py.ops.name_value_pair_remove)
<br/>