# otp.OneTickLib

### *class* OneTickLib(\*args, \*\*kwargs)

Bases: [`object`](https://docs.python.org/3/library/functions.html#object)

Singleton class for `otq.OneTickLib` to initialize it once.

Returns the same object if it was already initialized.

#### cleanup()

Destroy otq.OneTickLib instance and reset singleton class

#### set_log_file(log_file)

Set log file for given instance of OneTickLib

* **Parameters:**
  **log_file** -- path to log file

#### set_logging_level(lvl)

Logging level can be specified by using LoggingLevel Enum class

* **Parameters:**
  **lvl** (*LoggingLevel*) -- available values are LoggingLevel.MIN, LoggingLevel.LOW, LoggingLevel.MEDIUM or LoggingLevel.MAX
* **Returns:**

#### set_authentication_token(auth_token)

Set authentication token for given instance of OneTickLib

* **Parameters:**
  **auth_token** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- authentication token

#### *static* override_config_value(config_parameter_name, config_parameter_value)

Override config value of OneTickConfig

* **Parameters:**
  * **config_parameter_name** ([*str*](https://docs.python.org/3/library/stdtypes.html#str)) -- param to override (could be both set or not set in OneTickConfig)
  * **config_parameter_value** -- new value of the param