# otp.Operation.dtype

#### *property* Operation.dtype

Returns the type of the column or operation.

### Examples

```pycon
>>> t = otp.Tick(A=1, B=2.3, C='3')
>>> t['TIMESTAMP'].dtype
<class 'onetick.py.types.nsectime'>
>>> t['A'].dtype
<class 'int'>
>>> t['B'].dtype
<class 'float'>
>>> t['C'].dtype
<class 'str'>
```

#### SEE ALSO
[`Source.schema`](../source/schema.md#onetick.py.Source.schema)