# otp.Source.to_otq

#### Source.to_otq(file_name=None, file_suffix=None, query_name=None, symbols=None, start=None, end=None, timezone=None, raw=None, add_passthrough=True, running=False, start_time_expression=None, end_time_expression=None, symbol_date=None, concurrency=None, batch_size=None, query_properties=None)

Save [`otp.Source`](root.md#onetick.py.Source) object to .otq file and return path to the saved file.

* **Parameters:**
  * **file_name** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- Absolute or relative path to the saved file.
    If `None`, create temporary file and name it randomly.
  * **file_suffix** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- Suffix to add to the saved file name (including extension).
    Can be specified if `file_name` is `None`
    to distinguish between different temporary files.
    Default: ".to_otq.otq"
  * **query_name** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- Name of the main query in the created file.
    If `None`, take name from this Source object.
    If that name is empty, set name to "query".
  * **symbols** (str, list, [DataFrame](https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.html), [`Source`](root.md#onetick.py.Source)) -- symbols to save query with
  * **start** ([`otp.datetime`](../datetime/dt.md#onetick.py.datetime)) -- start time to save query with
  * **end** ([`otp.datetime`](../datetime/dt.md#onetick.py.datetime)) -- end time to save query with
  * **timezone** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- timezone to save query with
  * **raw** -- 

    #### Deprecated
    Deprecated since version 1.4.17.
  * **add_passthrough** ([*bool*](https://docs.python.org/3/library/functions.html#bool)) -- will add `onetick.query.Passthrough` event processor at the end of resulting graph
  * **running** ([*bool*](https://docs.python.org/3/library/functions.html#bool)) -- Indicates whether a query is CEP or not.
  * **start_time_expression** (str, [`Operation`](../operation/root.md#onetick.py.Operation), optional) -- Start time onetick expression of the query. If specified, it will take precedence over `start`.
  * **end_time_expression** (str, [`Operation`](../operation/root.md#onetick.py.Operation), optional) -- End time onetick expression of the query. If specified, it will take precedence over `end`.
  * **symbol_date** ([`otp.datetime`](../datetime/dt.md#onetick.py.datetime) or [`datetime.datetime`](https://docs.python.org/3/library/datetime.html#datetime.datetime) or int) -- Symbol date for the query or integer in the YYYYMMDD format.
    Will be applied only to the main query.
  * **concurrency** ([*int*](https://docs.python.org/3/library/functions.html#int)) -- Concurrency set for the query.
    Will be applied only to the main query.
  * **batch_size** ([*int*](https://docs.python.org/3/library/functions.html#int)) -- Batch size set for the query.
    Will be applied only to the main query.
  * **query_properties** (`pyomd.QueryProperties` or dict, optional) -- Query properties, such as ONE_TO_MANY_POLICY, ALLOW_GRAPH_REUSE, etc
* **Returns:**
  **result** -- Relative (if `file_name` is relative) or absolute path to the created query
  in the format `file_name::query_name`
* **Return type:**
  [str](https://docs.python.org/3/library/stdtypes.html#str)

### Examples

Create the .otq file from a [`otp.Source`](root.md#onetick.py.Source) object:

```pycon
>>> t = otp.Tick(A=1)
>>> t.to_otq()  
'/tmp/test_user/run_20251202_181018_11054/impetuous-bullfrog.to_otq.otq::query'
```